SME has years of experience with the design and manufacture of submersible motors, used in the offshore, subsea, military and dredging industries. This experience has resulted in SME being the company of choice as a manufacturer and supplier for many of the major offshore subsea companies.

SME submersible motors are specially designed to suit our customer requirements. With special attention being paid to the motor design. Resulting in SME manufacturing rugged motors with low maintenance requirements, a very high reliability, and a long service lifetime.

Silvercrest / Submersible Motor Engineering specialize in the bespoke manufacturing of submersible motors, Rov motors, and subsea motors, motor-pump sets, and HPU's for use on Rovs, subsea trenchers, subsea ploughs, dredgers and water lift pump systems. For use in the offshore Oil and Gas and Telecommunications industries, and subsea to depths of 4000m.

We offer a range of motors, motor-pump sets, ROV HPU, submersible, subsea and Rov motors (5hp to 1500hp) for use in the more popular classes of subsea ploughs and Rovs.

All of these motors are available in either SS316, Duplex, Super Duplex stainless steel, or with a hard anodized aluminium finish.

We can offer subsea submersible motors with a wide range of speeds and voltages (including 3000v, 6000v and 10,000v).

Silvercrest/SME now offers high quality, robust and reliable, water jetting pumps complete with SME submersible motor for all subsea operations. Ideal for ROVs, subsea Trenchers, Dredgers and other underwater applications.

Silvercrest/SME supply our own Pump/Motor combination. We offer a 2- pole, or 4-pole motor, coupled to our own designed pump (especially designed for trenching applications). Depth rating is 3000msw plus. The pump and motor combination is rigorously tested in our factory to full performance before despatch.

We recently delivered ten 260kW, 3000VAC, double ended, 2 pole, stainless steel bodied motors to CTC Marine Projects Ltd, for use on their fleet of sub-sea trenchers. This was a bespoke order that was completed in just six weeks from receipt of order.

Also three ROV204 submersible motors (300kw/4 pole/3300vac/3 phase/60hz) with stainless steel construction, and double ended for fitment with Sauer hydraulic pumps to SMD-Hydrovision. Together with 7.5kw motors for Rov cursor application.

Silvercrest / Submersible Motor Engineering will bespoke manufacture virtually any shape and size of submersible motor required for subsea operations. We will be very happy to discuss the details of your subsea motor / pump requirements in order to produce a detailed technical quote for you.

Silvercrest / Submersible Motor Engineering design and build specialized subsea motors, and support packages for use on all types of Rovs and underwater vehicles in the offshore and subsea industry. These submersible motors are usually made to order and vary from 1kW to 1500kW, 400 to 6600 Volts. 50 or 60 Hz, 2-Pole to 8-Pole.

There are two common methods of construction available: - Stainless steel construction, or Marine Grade aluminium that is Black anodised to resist corrosion. In addition we can offer Duplex and Super Duplex stainless steel construction.

These motors are usually oil filled and pressure compensated.

Common operating voltages are between 300 volts and 3300 volts - even for small 5kW motors. 6,000vac and 11,000vac motors also available by special request.

Silvercrest / Submersible Motor Engineering is a leading manufacturer of high quality submersible motors and pumps, designed specifically for subsea operations.

Silvercrest / Submersible Motor Engineering specialize in the bespoke manufacturing of submersible motors, pumps and ancillary equipment for use on Rovs, subsea trenchers, subsea ploughs, dredgers and water lift pump systems, for use in the offshore Oil and Gas and Telecommunications industries.

75HP Rov Subsea Motor.

We manufacture our own laminations, designed specifically to meet the individual requirements of each customer. We do not buy off the shelf standard rotor sets and fit them in a housing, as some other manufacturers will often do. As a result our motors are more efficient and generally ightly smaller, in both diameter and length, than our nearest competitors for any given power rating.

Silvercrest / Submersible Motor Engineering offer a range of ‘standard’ motors for use in well-established underwater installations, such as the more popular classes of Rov and subsea ploughs.

Silvercrest / Submersible Motor Engineering offer:

Repair and rewind of large high voltage (500kW, 6600V) submersible electric subsea motors.

High Temperature Submersible subsea motors in 6-inch to 20-inch frames suitable for operation in ambient temperatures of 75 Degrees C.

We offer Subsea Electric Motors. Full Range of Speed Options. All Voltages and Frequencies.

All Construction Options from Anodised Aluminium to Exotic Metal Alloys.

Extensive Electrical and Hydraulic Testing Facility.

Engineered Motor Solutions for Complex Applications .

World Leaders in the Design, Manufacture, and Supply of Subsea electric motors. Over 2000 motors delivered and operating worldwide.

Contact us today:

Email. sales@silvercrestsubmarines.co.uk

SME products have been designed and developed utilising many years of operating and service experience with submersible motors and subsea motors.

SME are a quality assured company and are certified to ISO 9001 by SGS for “Design, development, manufacture and testing of submersible subsea electric motors”.

SME produce their motors under a rigorous QA procedure to ensure that all motors are supplied in a “Quality and Reliability Assured” condition. In addition to ensuring the motors are supplied in excellent condition, SME believe it is their responsibility to try to ensure that the end users get many years of reliable life from their SME motors.

At SME we try to help the end user – not just sell them a motor in a box. We offer the services of experienced commissioning engineers to go to site and ensure the motors are installed, commissioned, and protected correctly. We also offer full 24 hour service and testing facilities.

At SME we are continually working to improve the performance of our products and for this reason we reserve the right to make changes without notice to any of the data in this brochure.

Please contact us direct for confirmation of any drawings dimensions or performance data.

SME SUBSEA MOTORS

SME can design and build Subsea motors to suit any requirements, due to our totally flexible design capabilities:

Flexible External Dimensions to suit all applications. Dimensions to allow drop in replacement of existing units. Anodised aluminium, or, 316 stainless steel or more exotic materials, such as Duplex.

Power drive to load using an output shaft with a standard coupling, or, close coupled. Single drive shaft, or, a drive shaft at both ends, double shaft extension.

SME can design and build a motor with a completely new lamination to meet special design requirements, if necessary.

SME design their motors so they do not run hot. Typical motors can run on deck for at least ten minutes on full load, with no cooling, without overheating. The motors are designed to be compact in size and suitable for heavy-duty applications, like trenching.

If weight is important, SME can design the motor for minimum weight by utilising an aluminium construction and a hollow motor shaft, while still ensuring the motor is generously rated for full load operations. If the motor is going to drive a hydraulic pump we recommend a close-coupled arrangement to save the weight of the coupling and the coupling housing.

SME can design and build motors for all voltages from 24 volts to 6600V with 50Hz or 60Hz frequencies, or for VVF requirements. High Voltage motors can have random wound stator windings, or formed coils, depending on space and weight constraints. The winding wire for the High Voltage motors is double insulated and passes a twisted wire test at 16,000 volts and is rated up to 155 Deg.C. All windings are designed to keep ‘turn to turn’ voltage to a minimum. All winding materials and cables are specially selected to be suitable for use in hydraulic oils.

In general, SME Subsea motors have low loss lamination steel (3 watts/kg), which allows for higher flux densities, and less heat, with less materials and weight.

All motors are oil filled and we recommend hydraulic oils for good lubrication characteristics in preference to electrical oil ( which has better di-electric capabilities, but worse lubrication capabilities).

If motors are going to drive a water pump, SME can design the motor to take the thrust load from the pump and keep the sea water out of the motor with a single or double mechanical seal arrangement.

Small thruster motors can be designed and built for voltage/speed control, which is a relatively simple speed control system and can be built with a thrust bearing incorporated to take the thrust load from the impeller.

To ensure the integrity of the motor housing, SME does not use castings. All components are machined from solid or from extrusions. The external aluminium components are typically 6061 T6 marine grade aluminium and hard anodized to a military specification.

All ball bearings are from well known brands such as SKF, FAG, or NSK. Oil seals are high temperature and typically made from Viton. Mechanical seals are typically Burgmann.

All hardware used on SME Subsea motors is 316SS.

All fixing holes are blind. Oil in and out fittings and the stator pack-fixing bolt, if applicable are sealed with O rings.

The preferred power cable entry system for SME motors is to use an “oily tube” connected to an adaptor, which is part of an oil tight rubber gland that is fixed to the stator frame. SME do not recommend bringing the power cables through the end-shields of the motor as this creates additional complications when the motors are stripped down during service (because the end-shields cannot be readily removed from the stator). Subsea connectors can be offered as an alternative to the Oily Tube if requested.

SME strongly recommend that the motors are fitted with PT100s fitted in the windings and also to the bearings. The internal motor temperatures are monitored and set up to alarm if the temperatures rise above a safe temperature. SME can also offer additional protection with a water detector. The auxiliary connections for PT100s, can be made through standard high pressure, water tight, plug and sockets as, supplied by “Subconn”, “Impulse”, and “Burton”. These are also fitted to a connection block on the stator, not on the end shield.

All finished motors are pressure tested to ensure they are “oil tight” and suitable for compensated operation down to 4000 metres.

All motors are rated for continuous operation and all prototype motors are full load performance tested at rated voltage and rated frequency to confirm their performance characteristics. All motors can be issued with a “Type Test Certificate” or even full load tested at additional cost, if required.

SME can offer to arrange for hydraulic pumps to be set up and tested on the motors at rated voltage and frequency.

SME can offer to supply Hydraulic Power Units, “complete”, with the addition of customer specified Hydraulic Pump.

SME Subsea motors can be designed and built for all subsea applications, such as ROVs, Trenchers, Ploughs, Submarines and Dredges.

All brands of Subsea motor can be serviced, repaired and tested by SME. In some cases the original motors can be significantly upgraded. If you are having problems with your existing Subsea motor please contact SME – we are ready and able to provide assistance and we are very price competitive.

Motors are available in AC Voltages from 24V to 6600V. Motors up to 4160V in Random Wound Designs. Above 4160V motors are manufactured using a Formed Coil system. Special random wound design motors may be available above 4160V for specific applications.

DEPTH RATING

All SME's Subsea Electric Motors are designed for external compensation and have been used at depths of more than 4000M. Compensation advice can be provided on request.

SPEED

Motors are available in a variety of speeds at both 50Hz and 60Hz.

Synchronous speed at different numbers of poles.

(Hz) 2P 4P 6P 8P 10P 12P

50 3000 1500 1000 750 600 500

60 3600 1800 1200 900 720` 600

Lower speed ratings are available on application. Motors are suitable for operation Using variable speed drives and SME can provide advice on variable speed drive operation if requested.

INSTRUMENTATION

SME Subsea Motors are available with a range of instrumentation:

Bearing and Winding Temperature Monitoring

Water Ingress Detection

Pressure Transducer

Resolvers and Encoders

Tachometers

COOLING

Motors are generally designed to operate with no additional cooling other than the ambient water temperatures but in some cases external cooling may be required. SME can provide motors with closed loop cooling circuits or motors that are suitable for use with externally fed cooling circuits.

ELECTRICAL CONNECTIONS

SME Subsea Motors use an oily tube termination for all power connections as standard. However, appropriately sized and rated Subsea connectors can be used as an alternative, either a Bulkhead Connection on the motor, or as part of a fixed Flying Lead Termination.

Instrumentation is generally terminated using a variety of Subsea Connectors. Customers are free to specify their Connectors of choice.

MECHANICAL INTERFACE

Motors are design built to suit the application and SME can supply a broad range of interfaces from direct coupled arrangements to the use of separate coupling housings.

FLANGES: NEMA, IEC, SAE, DIN Standards are all available as well as unique requirements.

Motors can be provided with Double Ended Arrangements to drive multiple loads.

MOTOR MOUNTING

Motors can be provided with various Mounting arrangements including Feet, Flanges, Brackets, or Clamping. In most cases SME can match the mounting interfaces of units being replaced to ensure ease of installation in existing equipment.

Motors can be manufactured for Horizontal or Shaft Up or Down installation.

COMPENSATION REQUIREMENTS

Motors are built to utilise external compensation. Motors are fitted with oil in and out ports as well as several bleed points to facilitate easy plumbing. Fittings can be provided with BSP, NPT or JIC and other fittings with both straight and tapered threads to provided uniformity on the installation.

There are a vast range of acceptable compensation fluids and SME can provide advice in the suitability of various oils.

SME MOTOR RANGE

SME is able to provide many and varied Subsea Motors to suit specific applications. Please contact us to discuss your requirements.

SUBSEA PUMPS

SME design and manufacture a world leading range of Electric and Hydraulically Driven Subsea Pumps. These are designed to operate as Heavy Duty Jetting Pumps on Subsea Trenchers and Ploughs, Subsea Dredging and Excavation Equipment. SME Pumps are robust and reliable in the toughest environments. Our flexible design capabilities mean we can manufacture Subsea Pumps to suit most applications.

SME Electrically Driven Subsea Pumps can be manufactured in all voltages from 380V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives.

All pump motors are designed for external compensation allowing for operation at depths as much as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load.

TESTING

SME‘s West Australian facility, located in Perth, provides for an extensive testing regime for repaired and overhauled motors. SME can full load test motors on our dynamometers and can also offer performance testing of complete pump/motor units in our purpose built test tank – at the specified voltage and frequency up to 6600 volts.

SME can guarantee motors that have been serviced and repaired are fit for purpose before dispatch, providing customers with complete confidence in the work prior to re-installation. All motors that re rewound by SME are subject to an immersion pressure test which is conducted in our pressure test vessel to ensure the integrity of the windings prior to assembly and load testing. Our commitment to a strict testing regime protects our clients from the risks of downtime caused by unexpected failure.

Our Factory offers the following equipment:

High Voltage Transformers 1000/2400/3300/4160/6600V

High Current Voltage Regulator

Dynamometer Load Test Equipment 300kW/2600kW

Power Generation 350kVA/1350kVA

15kV Hi Pot and Surge Tester

Subsea Pump Testing Facilities

SME COMPANY PROFILE

Submersible Motor Engineering Pty Ltd is an Australian Company that designs and manufactures Submersible and Subsea Electric Motors for Global Markets. SME has the ability to design and produce specialist electric motors for complex applications, in many cases for a “one off” requirement. SME should be the company of choice to work with to provide High Quality Engineered Solutions for your Subsea Motor requirements.

SME offers a Repair, Rewind Modification, and Technical Support Service, in Perth, and in Phoenix. With a new facility soon to be opened in the United kingdom. Our facilities ensure that we can handle any job we are confronted with, regardless of complexity. Our purpose built testing facility ensures absolute confidence in workmanship and reliability for our clients.

When it comes to Sales and Service of Submersible and Subsea Motors, SME’s range of Worldwide Locations ensures that we can provide excellent service and technical support on our own SME range of products, but also the products from all other manufacturers of Subsea Motors.

SUBMERSIBLE MOTOR-PUMP SET (HPU) for IMMEDIATE SALE.

New 65Hp submersible Rov HPU for sale. The motor-pump set is brand new, direct from our factory and has been constructed specifically for this purpose.

Submersible Motor Engineering Hydraulic Power Units (HPU) are used throughout the subsea oil and gas industry, for subsea hydraulic power generation, and for running high pressure/high flow water pumps.

SME now offers a high quality, robust and reliable, water jetting pump complete with SME submersible motor for all subsea operations. Ideal for ROVs, Trenchers, Dredgers and other underwater applications.

The SME Jetting Pump comes complete with a 265kW, 2- Pole, 3300V 60Hz, 3500rpm, all 316 Stainless Steel motor. The Pump is single stage with the impeller mounted directly onto the motor shaft (So no pump bearings to wear). This Impeller is easily removed and replaced as the only wear point. Easy on site serviceable. This pump provides flow rates from 1000-1500m3/h.

Input voltage 380 Volts and 50 Hz. The application being for a hydraulic power pack aggregate which will work on a ship, and be in contact with sea water. Power capacity of the motor should be around 25 -30 kW and speed of rotation about 1400 - 2000rpm, pressure 500 bar. We can offer the following motor, SME ROV10-4, 30kW, 4 Pole, 1500rpm, 380/3/50, Aluminium Construction Subsea Motor to Drive Hydraulic Pump, Epoxy coated for protection.

Heat Exchanger Motors.

We now offer a complete range of water filled, watertight, submersible subsea motors with integral heat exchangers in 10-inch, 12-inch, 14-inch and 16-inch size for 2 pole and 4 pole speeds.

These subsea motors offer a significantly lower temperature rise when compared with standard submersible subsea motors. This is an advantage that can be utilized when customers want to operate in water with a high ambient temperature, or when there will be minimal cooling water flow available. Even with the standard applications the lower temperature rise will extend the life of the motor significantly. There is an accepted rule of thumb for electrical insulation that its life is shortened by one-half for every 10°C increase in operating temperature. The winding operating temperature for a normal water filled submersible motor is about 70 degrees.C, in 25 degree.C water. However an SME Heat Exchanger Motor will be running at about 45 degree.C. (This is 25 degrees cooler). This magnitude of difference in temperature rise will have a significant positive impact on motor life.

The basic design principle for these subsea motors is to circulate the internal water in the motor remove the heat from the "active" parts of the motor, and then pass it through a heat exchanger which brings the internal water back to somewhere close to the external ambient water temperature - before feeding it back through the "active" parts again to remove more heat. The heat exchanger increases the external surface area of the motor by 50% and the water circulation allows the heat to dissipate more evenly and quickly out of the subsea motor and into the external water. The small impeller inside the subsea motor that circulates the water has an insignificant impact on the motor efficiency in terms of additional load, while the subsea motor has an improved efficiency because the stator and rotor copper losses are reduced due to the lower operating temperature.

Motor Thermal Protection Unit

All SME Heat Exchanger Motors come with four (4) PT100 temperature sensors installed in the motor.

One PT100 is attached to the thrust bearing assembly that will detect excessive thrust loads

and overheating in the thrust bearing.

One PT100 is installed in the end winding on the non-drive end of the motor.

One is installed half way down the slot in the winding in the middle of the motor.

One is installed in the end winding on the drive end of the motor.

SME can offer one temperature protection unit (SME4TM) to monitor all four PT100'S installed in the Heat Exchanger Motor.

Water Pump Motors.

Our water pump motors are not vertically oriented, water filled, down hole pump motors, as has previously been the norm throughout the subsea industry. Silvercrest / Submersible Motor Engineering motors are substantial oil filled submersible motors, designed to run in the horizontal axis with a large thrust bearing assembly to withstand water pump loads.

We can offer specially designed turbine pumps to match our motors. Again these pumps are not the usual vertically oriented type, these are specifically designed with a twin bearing arrangement, for use in the horizontal axis. Thus dramatically extending operational life and improving pump reliability.

Silvercrest recently delivered ten 260kW, 3000VAC, double ended, 2 pole, stainless steel bodied motors to CTC Marine Projects Ltd. The motors will be used by CTC on their subsea plough and trenching vehicles worldwide. This was a bespoke order that was completed in six weeks from receipt of order, ex-works from our manufacturing facility in Australia.

The 260kW/ 3000V / 60Hz / 2 pole pump motors (designed specifically for use in the horizontal axis) were fitted with shafts at both ends, in order to mate with three tandem mounted hydraulic pumps on one end and a Hayward Tyler M6 single stage water pump-set on the opposite end. In this 260kW model, rather than using the pivot shoe arrangement, typical of vertically oriented pump-sets, heavy duty tapered roller bearings were fitted to the rotor to manage the water pump induced end-loads. Thus giving a calculated bearing life in excess of 11,000 hours, even when used in the horizontal axis. Depth rating on each motor is 10,000 meters, with oil filled compensation. Motor housings are 316 stainless steel, with Mylar coated windings (the ultimate in winding coating technology) being used in each motor at the request of CTC, giving an insulation rating of >16kV at a temperature of 140 degrees C.

Rov and Subsea Plough and Trencher Motors.

Silvercrest offer an established range of Rov motors ranging from 5HP to 500HP. All of these motors are available in either SS316 or Hard Anodized Aluminium finish. We will also design and build submersible motors to suit your individual requirements and subsea project.

Our motors are in use with most of the major operators worldwide such as Saipem, SMD Hydrovision, Sonsub, CTC Marine Projects, Impresub, Fugro, Thales, MTQ, LD Travocean and Canyon Offshore.

Silvercrest / Submersible Motor Engineering has recently manufactured and supplied two 265kw motor-pump sets for SMD-Hydrovision (England). The package comprised 265kw subsea motors, 2-pole, 3000v, 3ph, 60hz. Together with Jetting Pumps (wet end only, operating at 2-pole, 60 hertz). The motors were a stainless steel construction, and the pumps Zinc Free Bronze. These motor-pump sets will be installed onto one of the world’s largest subsea trenching vehicles.

In addition, Silvercrest / Submersible Motor Engineering has manufactured and delivered in just eight weeks from order, two water turbine pumps to CTC Marine Projects based in Teeside (England). The pumps will be used by CTC, in conjunction with Silvercrest / Submersible Motor Engineering submersible 260Kw motors, on their subsea plough and trenching vehicles worldwide.

The two Silvercrest SH-M6R submersible pumps with a 231mm OD impeller and a nominal operating speed of 3600rpm will be used as an alternative to the Hayward Tyler model M6-1 stage CI/BR/SS submersible pump.

The Silvercrest pump although matching the performance of the Hayward Tyler unit, is specifically designed for horizontal operation providing a greatly increased reliability for use in horizontal and downward angled operation.

Submersible motors with 60hz frequency, 1180rpm speed, 6,6KV voltage, and 2000kW power rating. Complete with 50m power cable, and PT100 with 50m instrument cable. To be used as fire water pump drive units.

SME ROV12-2, 48kW 65HP, 2-pole 3000/3/50, Aluminium Construction ROV Motor fitted with Rexroth A10VO28DFR1/31R-PSC62N00 Hydraulic Pump. Motor to have Burton Connector for Power Leads. Fitted with Temperature Sensing and Water Detectors terminated on Subconn or similar connector. Power Conductor and Sensor Connector Blocks to be in the same position on the motor at opposite ends (or as requested). Epoxy coated for protection.

SME now offers high quality, robust and reliable, water jetting pumps complete with SME submersible motor for all subsea operations. Ideal for ROVs, Trenchers, Dredgers and other underwater applications.

Silvercrest/SME supply our own Pump/Motor combination. We offer a 2- pole, or 4-pole motor, coupled to our own designed pump (especially designed for trenching applications). Depth rating is 3000msw plus. The pump and motor combination is rigorously tested in our factory to full performance before despatch.

The SME Jetting Pump can also be offered complete with a 265kW, 2- Pole, 3300V 60Hz, 3500rpm, all 316 Stainless Steel motor.

The Pump is single stage with the impeller mounted directly onto the motor shaft (So no pump bearings to wear). This Impeller is easily removed and replaced as the only wear point. This pump provides flow rates from 1000-1500m3/h.

SILVERCREST / SME.

TEL: (+44) 1285 760620

EMAIL: Sales@SilvercrestSubmarines.com

Some recent submersible subsea and ROV motor and HPU projects for our subsea clients, have included the following:

Our motors are manufactured to the clients exact requirements as indicated in the final specification, and the SME drawings.

a) Submersible motors each 550Hp, 50Hz, 2-poles (2900rpm), at 6000v. This being for a major project, that will couple Kazis pumps (turbine type suitable to enter Bore holes) with Silvercrest / Submersible Motor Engineering motors. All motors to have NEMA flange to connect with the pumps. Installation depth expected to be 350m.

q) Three submersible motors for 200m water depth, rated for VSD. To operate pumps that will rotate between 300 and 600 rpm. The gearbox having a reduction of 3.5. Motor speed has to be within +/- 1000 and 2000 rpm.

t) Two Parker F11-150 hydromotors mounted on gearbox. Max rotations per motor: 2467 rpm. Max. torque per motor: 484 Nm. Most used case: Max rotations per motor: 1337 rpm. Max torque per motor: 131 Nm. We suggest our ROV144-130kW (175Hp), 4P, 3300V, 82Hz, 2500 RPM, motor. At the slower speeds the performance will match the requirements of roughly: 25kW, 1811 Volts, 45Hz, for the 130kW motor. It is understood that these motors will be running on a VVVF Drive, and that the Drive Output Voltage will be roughly proportional to the Hz. Motors are externally compensated so depth can be as much as 3000m.

u) Three Parker F11-250 hydromotors mounted on a gearbox Max rotations per motor: 2230 rpm. Max. torque per motor: 864 Nm. Most used case: Max rotations per motor: 1141 rpm. Max torque per motor: 278 Nm. We suggest our ROV164-210kW (280Hp), 4P, 3300V, 74Hz, 2250 RPM motor. At the slower speeds the performance will match the requirements of roughly: 40kW, 1688 Volts, 38Hz, for the 210kW motor. It is understood that these motors will be running on a VVVF Drive and that the Drive Output Voltage will be roughly proportional to the Hz.

v) A submersible motor for use on a ROV with a depth rating of maximum 50 meters in seawater. Double shaft motor 56 kW, 3000V, 3-phase 60Hz, 1800 rpm. On each side of the motor a pump unit will be fitted. SME ROV12-4, 56kW, 75HP, 4-Pole, 3000/3/60, Aluminium Construction Subsea Motor to direct couple Hydraulic Pumps to both ends. This will be a motor with Female Shaft, and close couple the pump to the motors using a face seal against the pump.

a1) The rewire and service of two 150hp, 1750rpm, 3000/3/60, Curvetech motors. We are able to offer a Full Factory Rewind and service of Curvetech 150hp motors. Our standard refurbishment programme includes the following:

Strip down and through inspection of the complete motor.

Cleaning and anti-corrosion treatment as required.

Shaft seal replacement (as may be required)

Drive end-bearing replacement if required.

Motor Insulation and Dynomometer testing.

Motor rewind.

Rebuild of the complete motor, test and despatch by sea or airfreight.

Any further work deemed necessary as a result of the factory inspection will be quoted separately, and a decision given by the customer as to the course of action required on an item-to-item basis.

Submersible motors to match with Rexroth hydraulic pumps. 30Kw, 4P, 380V / 50HZ submersible motor to match with 4VSO40DR/32R-PPA Rexroth pump. Oil temperature at 0-80 degrees. Horizontal mounting, with hollow shaft. The motor to be contained in a Hydraulic oil bath. We are pleased to offer a highly modified Cast Iron Motor (30kw, 4-pole, 380/3/50, suitable for running immersed in an oil bath, with a special Flange and Female Shaft to accept the Rexroth hydraulic Pump.

A submersible electric motor to drive a dredging pump, in a water depth of 20m. SME ROV18-4 ,400kW 530HP, 4 Pole, 400/3/50, SS316 Construction, Subsea Motor with 20m of Cable terminated in Bulkhead on the motor. Motor with RTD's and Water Detector.

SME ROV14-4, 150kW 200HP, 690/3/60, Anodised Aluminium Construction Subsea Electric Motor. Fitted with a Rexroth A11VLO260LRDS/11R-NTD12N00 (CW ROTATION) PUMP-PISTON-VARIABLE at one end, and a Rexroth AZPW-2x-019-022LRRXXMB-SO593P (CCW ROTATION) PUMP-SINGLE-GEAR-SAE`A` 19cc, at the other end. Motor will have Oily tube for Power, and Subsea Connector for Temperature and Water Ingress Sensors. Motor available in SS316 stainless steel if preferred.

Motor Rewinds and Refurbishment.

Our standard motor refurbishment and rewind programme includes the following:

Strip down and through inspection of the complete motor.

Cleaning and anti-corrosion treatment as required.

Shaft seal replacement (as may be required)

Drive end-bearing replacement if required.

Motor Insulation and Dynomometer testing.

Motor rewind.

Rebuild of the complete motor, test and despatch by sea or airfreight.

The method of construction changes at 4100V from Random Wound to Formed Coils so there is a jump from 4100V to the 4500V motor. The 4500V motor is constructed very similarly to the 6600V Motor.

Silvercrest will bespoke manufacture virtually any shape and size of submersible motor and submersible pump required for subsea operations. We can offer a wide range of HPU and motor-pump sets complete, subject to any modifications, and changes you may require. For example:

SME ROV14-2 300kw 2 pole 3000/3/60 Oil filled Stainless Steel Motor with In built Circulation System and Heat Exchanger coupled to a Sterling 300M-3 Zinc Free Bronze Pump with a duty of 828cu.m/hr at 9 Bar.

ROV20-4 type motors, 4 pole/6600vac/3 phase/60hz, with stainless steel construction. Double Ended for fitment with Sauer hydraulic pumps Series-90, with Subsea Connectors for Power and Sensors. We can offer the ROV20 motor with shafts at both ends, to mate with the Sauer Series 90 pumps .

SME ROV24-6, 400kW, 6-Pole, 4100/3/30-64, SS316 Construction Motor. Double Ended to have Water Pump at one end, and the Hydraulic Pump at the other end.

SME can design and build SUBSEA motors to suit any requirement due our totally flexible design

capabilities:

Flexible External Dimensions to suit all applications.

Dimensions to allow drop in replacement for existing units.

Anodised aluminium, or, 316 stainless steel.

Power drive to load using an output shaft with a standard coupling, or, close coupled, etc.

Single drive shaft, or, a drive shaft at both ends, (double shaft extension).

SME can design and build a motor with a completely new lamination to meet special design requirements, if necessary.

SME design their motors so they do not run hot. Typical motors can run on deck for at least 10 minutes on full load, with no cooling, without overheating. The motors are designed to be compact in size and suitable for heavy duty applications, like trenching.

If weight is important SME can design the motor for minimum weight by utilising an aluminium construction and a hollow motor shaft, etc., while still ensuring the motor is generously rated for full load operation. If the motor is going to drive a hydraulic pump we recommend a close coupled arrangement to save the weight of the coupling and the coupling housing.

SME can design and build motors for all voltages from 24 Volts to 6600 Volts with 50Hz or 60Hz frequencies, or for VVVF requirements. High Voltage motors can have random stator windings, or formed coils, depending on space and weight constraints. The winding wire for the High Voltage motors is double insulated and passes a twisted wire test at 16,000 volts and is rated up to 155 Deg.C.

All windings are designed to keep 'turn to turn' voltage to a minimum. All winding materials and cables, etc. are specially selected to be suitable for use in hydraulic oil.

In general the SME SUBSEA motors have low loss lamination steel (3 Watts/kg), which allows for higher flux densities, and less heat, with less material and weight.

All motors are oil filled and we recommend hydraulic oils for good lubrication characteristics in preference to electrical oil which has better di-electric capabilities, but worse lubrication capabilities.

If motors are going to drive a water pump SME can design the motor to take the thrust load from the pump, and keep the sea water out of the motor with a single or double mechanical seal arrangement.

Thruster motors can be designed and built for voltage/speed control, which is a relatively simple speed control system, and they can also be built with a thrust bearing incorporated to take the thrust load from the impeller.

To ensure the integrity of the motor housing SME does not use castings. All components are machined from solid or from extrusions. The external aluminium components are typically 6061 T6 marine grade aluminium and hard anodised to a military specification.

All ball bearings are from well known brands such as SKF, FAG, or NSK. Oil seals are high temperature and typically made from Viton. Mechanical seals are typically Burgmann.

All hardware used on SME SUBSEA motors is 316SS.

All fixing holes are blind except the "oil in" and "oil out" fittings and the stator pack fixing bolt, if applicable.

The preferred power cable entry system for SME motors is to use an "oily tube" connected to an adaptor that is part of an oil tight rubber gland, which is fixed to the stator frame. SME do not recommend bringing the power cables through the end shields of the motor because this creates additional complications when the motors are stripped down during service, because the end shields cannot be readily removed from the stator. Subsea connectors can be offered as an alternative to the Oily Tube if requested.

SME strongly recommend that the motors are supplied with PT100s fitted in the windings and also in the bearings and that the internal motor temperatures are monitored and set up to alarm if the temperatures rise above the "norm". SME can also offer additional protection with a water detector, etc. The auxiliary connections for PT100s, etc. can be made through standard high pressure, water-tight, plug and sockets as supplied by "Subconn", "Impulse", and "Burton". These are also fitted to a connection block on the stator, not on the end shield.

All finished motors are pressure tested to ensure they are "oil tight" and suitable for compensated operation down to 4000 metres.

All motors are rated for continuous operation and all prototype motors are full load performance tested rated voltage and rated frequency to confirm their performance characteristics. All motors can be issued with a "Type Test Certificate" or even full load tested at additional cost, if required.

SME can also offer to arrange for hydraulic pumps to be set up and tested on the motors at rated voltage and frequency.

SME can offer to supply Hydraulic Power Units complete with the addition of a customer specified Hydraulic Pump.

SME is a fully quality assured company to ISO 9001.2000 for "Design, development, manufacture, and testing of submersible electric motors and electric motors for remotely operated vehicles".

SME Subsea motors can be designed and built for all subsea applications, such as ROVs, Trenchers, Ploughs, Submarines, Dredges.

All makes of subsea motor can be serviced, repaired and tested by SME. In some cases the original motors can be significantly upgraded. If you are having problems with your existing subsea motors please contact SME - we are keen to help and we are very price competitive.

At SME we are continually working on improving the performance of our products and for this reason we reserve the right to make changes without notice to any of the data in this brochure.

Please contact us direct for confirmation of any drawing dimensions or performance data.

SUBSEA MOTORS and ROV MOTORS.

SME are designing and building specialized motors for use SUBSEA for the offshore industry.

These motors are usually made to order and vary from 1kW to 600kW, from 400 to 4160 Volts,50 or 60 Hz, 2-Pole or 4- Pole.

There are two common methods of construction - stainless steel construction or Marine Grade aluminium that is Black anodized to resist corrosion.

These motors are usually oil filled and pressure compensated and the common operating voltages are between 2300 volts and 3300 volts - even for small 5kW motors. Some of these motors operate at depths down to 4000 meters.

SILVERCREST / SME MOTORS FOR OUR SUBSEA CLIENTS.

ROV submersible motors.

We are pleased to be able to offer a replacement motor to meet your specific requirements.

Final dimensions and shaft arrangement to be confirmed by customer, foot mountings are adjustable and can be manufactured to

suit customer requirement.

Volts 3300VAC / 60hz / Three Phase

Poles 4

Speed 1750 RPM

Depth Rating 3000 Meters nominal

Compensation Oil filled - external compensator

Housing 316 SS or Hard Anodized Aluminium.

Mounting Horizontal

Shaft TBC

KW 41kW @ 60 Hz

Insulation Rating >16kV @ 140 deg C (Mylar)

Shaft Seals Bergman mechanical seals.

300 kW PUMP MOTORS.

We can offer you submersible motors with the following specification: -

Volts 3300VAC / 60hz / Three Phase

Poles 2

Speed 3500 RPM

Depth Rating 3000 Mts nominal

Compensation Oil filled - external cooler/compensator included

Housing 316 SS

Mounting Vertical (As per details to be supplied)

Shaft See above (As per details to be supplied)

KW 300kW @ 60 Hz

Insulation Rating >16kV @ 140 deg C (Mylar)

Shaft Seals Bergman mechanical seals.

Single pump motor to replace a Hayward Tyler Sumo 260kW motor.

We can offer the ROV14 motor with shafts at both ends; to mate with 3 x tandem mounted hydraulic pumps on one end, and a 2-stage Plueger MI16 water pumpset on the opposite end. The female spline can be manufactured to mate with the supplied pumpset.

Our purpose built pump motors are designed specifically for use in the horizontal axis. Unlike a down hole pump motor such as the HT Sumo, our motors do not use pivot shoe thrust assemblies. As a result our motors are compensated for depth pressure using oil rather than distilled water as in the case of down hole pump motors.

Unlike most motor manufacturers, we manufacture our own core laminations on site, affording maximum flexibility in design. We can bespoke manufacture virtually any shape of motor you may require.

In this 260kW model, rather than use the pivot shoe arrangement, we fit heavy-duty tapered roller bearings to the rotor to manage the water pump induced end loads. Thus increasing the reliability and service life of the motor by a factor of 10 or more when used in the horizontal axis.

Our superior Mylar coated windings are the ultimate in winding coating technology. Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degs C. No other winding coating even comes close to this standard.

We can offer you submersible motors with the following specification:-

Volts 3000VAC / 60hz / Three Phase

Poles 2

Speed 3500 RPM

Depth Rating 3000 Mts nominal

Compensation Oil filled - external compensator (not included)

Housing 316 SS

Mounting Horizontal (Details to be confirmed)

Shaft See above (Details to be confirmed)

KW 260kW @ 60 Hz

Insulation Rating >16kV @ 140 deg C

Shaft Seals Bergman mechanical seals. (Tandem seals available)

The final specification will need to be agreed upon placement of an order. Insulation rating using Mylar windings.

ROV 14 260kW Pump Motor under construction.

250kw/ 3300V / 50Hz / 4 Pole motors for Hydraulic Power Packs.

New submersible motors, for your hydraulic power pack project The requirement being for 250kw, double ended drive, 3300V / 50Hz, 4 pole, motors with subsea connector to be defined.

Double Ended for fitment with hydraulic pumps, with Subsea Connectors for Power and Sensors. In addition we can supply if requested cooler/heat exchangers (at additional cost), for each of the motors purchased.

Our purpose built pump motors are designed specifically for use in the horizontal axis. Unlike a down-hole pump motor such as the HT Sumo, our motors do not use pivot shoe thrust assemblies. As a result our motors are compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior Mylar coated windings are the ultimate winding coating technology. Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degrees C. No other winding coating even comes close to this standard.

Subsea Motor fitted with SMP 9WH-4 Stage NAB Construction Pump to provide 4000L/M at 5Bar or 1060GPM at 170ft Head. Motor is oil filled and externally compensated with oil. Tube connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring.

SME ROV22-14, 120HP, 14-Pole, 3000/3/60, SS316 construction.

Subsea Motor fitted with Jetech 15055-UW-H Subsea Quintuplex High Pressure Pump to provide 50L/M at 850Bar. Motor is oil filled and externally compensated with oil. Tube connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring. This unit is operating at the lower end of its range and can have an increased output if necessary.

SME ROV22-12, 120HP, 12-Pole, 3000/3/60, SS316 construction.

Subsea Motor fitted with Jetech 100J3-UW-H Subsea Triplex High Pressure Pump to provide 46L/M at 850Bar. Motor is oil filled and externally compensated with oil. Tube connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring.

The motor in the photograph is a 150HP ROV HPU motor as delivered to Fugro Ltd for use on the FCV ROV. With modifications to the pump mount and shaft and foot mounts arrangements, to suit the Linde HPR160 hydraulic pump unit. This motor is available in either hard anodized marine grade Aluminium or in SS316 stainless steel construction.

150 HP HPU MOTOR.

Volts 3300VAC / 60hz / Three Phase

Poles 4

Speed 1750 RPM

Depth Rating 3000 Mts nominal

Housing Hard Anodized Aluminium (SS316 optional)

Length 671 mm

Diameter 350 mm

Height 390 mm

Mounting Horizontal

Shaft TBA

HP 150 HP @ 60 Hz

Insulation Rating >16kV @ 140 deg

Shaft Seals Bergman mechanical seals.

Cable Entry TBC

Sensors Water ingress x 2 / Temperature x 2 – TBC

400kW/ 3300V / 60Hz / 4 Pole motors for Hydraulic Pumps.

These motors being used to power Sauer Series-90-L250 hydraulic pumps. The requirement being for 400kw, single ended drive, 3300V / 60Hz, 4-pole, with subsea connector to be defined. The motors being required for an underwater vehicle.

Single ended for fitment with Sauer hydraulic pumps Series-90-L250, with subsea connectors for power and sensors. Our purpose built submersible pump motors are designed specifically for use in the horizontal axis. SME motors are compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior Mylar coated windings are the ultimate in winding coating technology. Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degrees C.

This motor was designed as a thruster motor and has an in-built thrust bearing arrangement to handle thrust in both directions. The drawing is for a 2-pole motor but the 4-pole version would be a similar size. The motor mounting arrangements and shaft requirements can be modified to suit different customer applications.

Full Factory Rewind and service of 260kw motors.

Our standard refurbishment programme includes the following:

Strip down and through inspection of the complete motor.

Cleaning and anti-corrosion treatment as required.

Shaft seal replacement.

Drive end-bearing replacement if required.

Motor Insulation and Dynomometer testing.

Motor rewind.

Rebuild of the complete motor, test and despatch by sea to UK.

Burton power connector to be disconnected.

53mm Burgman seal upgrade

All ports will be opened from 3/8 to ½ BSP as requested.

Spot facing as requested.

Any further work deemed necessary as a result of the factory inspection will be quoted separately, and a decision given by the customer as to the course of action required on an item-to-item basis.

132Kw/ 1100v/2 pole/50hz/Foot Mount Motor.

A replacement 132kw Brook motor for use in a salt mine. We are pleased to be able to offer you our direct replacement SME 132kW/2P/1100V/50Hz/RC315S/M Foot Mount Motor. This unit will be very similar to the Brooke mine motor (Type: W-DF315SN. Serial number: B033586), and have the same voltage and feet spacing as the Brook motor.

Volts 1100VAC / 50hz / Three Phase

Poles 2

Speed 2975 RPM

Amps: 81A

Shaft TBC

Please note this is a standard air-cooled motor with the terminal box on top. It has no mining approvals or flameproof approvals. The Brook motor is fitted in a 315S-frame (508 and 406mm foot dimensions). The SME motor will be fitted in a frame with the same foot dimensions.

SME ROV104-65HP-3000V- 50HZ submersible motor.

Deepwater subsea motors for your 4500m ROV system. The motors to be used in the HPU (Hydraulic Power Units) of a 0hp ROV at a depth of 4500m without a TMS. The pumps for the HPU, will be Rexroth axial piston pumps, type AA10VSO71DRG/31R-PPA12N00. These are pilot controlled constant pressure pumps, with a displacement of 71cc/r, maximum output pressure 240bar, and shaft speed 1500rpm.

Our SME ROV104-65HP-3000V-50HZ Submersible Motor.

Construction in aluminium alloy. This motor will be manufactured to your exact requirements. Sensors: We have quoted a Subsea Connector to allow Pin Outs for 1 x RTD for Temperature, and 1 x Water Detector.

Power: We have quoted to supply 3m length of Oily Tube with Bulkhead Connectors to be mounted on the Main Junction Box.

New submersible motors. These motors being used to power Sauer Danfoss Series-90-250 hydraulic pumps. The requirement being for either 400kw or 500kw motors, double ended drive, 6600V, 60Hz, 4-pole, with subsea connector to be defined. Our ROV20-4 type motors, 4-pole/6600vac/3 phase/60hz, with stainless steel construction. Double Ended for fitment with Sauer hydraulic pumps Series-90, with Subsea Connectors for Power and Sensors. We can offer the ROV20 motor with shafts at both ends, to mate with the Sauer Series 90 pumps that you intend using.

400kW/ 3300V / 60Hz / 4 Pole motors for Hydraulic Pumps.

New submersible motors. These motors being used to power Sauer Series-90-L250 hydraulic pumps. The requirement being for 400kw, single ended drive, 3300V / 60Hz, 4-pole, with subsea connector to be defined. The motors being required for an underwater vehicle.

Our ROV20-4 motors, 400kw/4 pole/3300vac/3 phase/60hz, with stainless steel construction. Single ended for fitment with Sauer hydraulic pumps Series-90-L250, with subsea connectors for power and sensors.

Our purpose built submersible pump motors are designed specifically for use in the horizontal axis. SME motors are compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior Mylar coated windings are the ultimate in winding coating technology. Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degrees C.

New submersible motors (with option for one additional motor to fulfil your spares commitment). These motors being used to power Sauer Series-90 hydraulic pumps. The requirement being for 300kW, double ended drive, 3300V / 60Hz, 4 pole, with subsea connector to be defined.

Double Ended for fitment with Sauer hydraulic pumps Series-90, with Subsea Connectors for Power and Sensors. We can offer the ROV20 motor (as per the attached drawing) with shafts at both ends, to mate with the Sauer Series 90 pumps that you intend using. Our purpose built pump motors are designed specifically for use in the horizontal axis. Unlike a down-hole pump motor such as the HT Sumo, our motors do not use pivot shoe thrust assemblies. As a result our motors are compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior Mylar coated windings are the ultimate in winding coating technology. Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degrees C. No other winding coating even comes close to this standard.

The motor has the following specification and is a direct drop in replacement for the Curvetech 100HP unit. The motor is presently set up to receive a Rexroth A10VSO140 pump, but can be modified to accept other pump models if required. The motor is brand new, direct from our factory and has been constructed specifically for this purpose.

ROV124-100HP, 4-pole, 3000v, 60Hz.

Mil Spec hard-anodised T6 hardened 6061 grade Aluminium construction, with all 316 hardware. Rotor dynamically balanced. Oil filled externally compensated. Fully performance tested on Dynamometer at rated voltage and frequency, subsea connectors for power and instrumentation. Designed for maximum electrical efficiencies to reduce full load currents. Motor designed for low operating temperatures to extend reliable lifespan. Specialised winding insulation system to ensure long operating life even under the most arduous of duties. On Deck operation generally allowable.

SME ROV14, 150Kw, 4 Pole, 3000/3/50, 1490rpm Stainless Steel Construction Subsea Motor designed to close couple to Rexroth A11VLO190DRS-11-LN-12N00 Hydraulic Pump. The motor will cool itself in the ambient seawater. Sensors and electrical connector are included in the motor price.

SME ROV14-2, 150kw, 2-Pole, 3000/3/60, SS316 Construction Subsea Motor fitted with 250GM-4C-177-3550 Nickel Aluminium Bronze Pump to produce 210m3/Hr (two pumps 420m3/h). Absorbed Power 130kW with 151kW Non Overloading. The final technical specification and manufacturing drawings to be agreed upon placement of the order by the client.

SME ROV24-6, 400kW, 6-Pole, 4100/3/30-64, SS316 Construction Motor. Double Ended to have Water Pump at one end, and the Hydraulic Pump at the other end.

SME ROV16-2, 400kW, 2-Pole, 3300/3/60, SS316 Construction Subsea Motor with integral Thrust Bearing and Interface to suit operation with your Water Pump (vertical operation). The final specification and manufacturing drawings to be agreed upon placement of the order. The motor will be manufactured to your exact requirements as indicated in your specification, and the SME drawings.

SME ROV12-2 48kW 65HP 2-pole 3000/3/50 Aluminium Construction ROV Motor fitted with Rexroth A10VO28DFR1/31R-PSC62N00 Hydraulic Pump. Motor to have Oily Tube connection for Power Leads. Fitted with Temperature Sensing and Water Detectors terminated on Subconn or similar connector. Power Conductor and Sensor Connector Blocks to be in the same position on the motor at opposite ends (or as required).

SME ROV228, 325kW, 8-pole, 3300/3/60, SS316 construction, Subsea Motor to drive Water Pump. Motor to include Water Detector and Temperature Detector terminated at Subconn Connector. Power terminated through Oily Tube Connection. Motor to have standard deep groove bearings absorbing no thrust. Motor for horizontal use. Motor designed for continuous operation and will provide at least two minutes of unloaded operation on deck. Epoxy coated for protection.

Submersible motor for operations at 6000m water depth. We are pleased to offer our SME ROV22-12, 150kW, 12-Pole, 500rpm, 3300/3/50, SS316 Construction Subsea Motor. This motor will be manufactured to your exact requirements, and to interface with your submersible pump.

We can offer motors at both 3300v and 6600v. However in order to offer a detailed quotation, we will need additional information from you concerning the motor application, materials of motor construction that you require (SS316 is suggested), Pump Thrusts, Pump Interface, etc. Please email us as much information as possible, and perhaps a pump drawing or technical data sheet. We will then revert back to you.

A 7.5kw motor to replace an obsolete 7.5kW / 2000V / 4 pole / 60Hz Motor based on a Ziehl-Abegg winding set. We can offer you our SME ROV10-4, 7.5kW, 4 pole, 2000/3/60, Aluminium Construction Subsea with Burton Connector. Motor flange and shaft would be to suit pump type, and motor can be oily tube or connector. The final specification and manufacturing drawings to be agreed.

We offer AC thrusters as direct replacements to existing DC thrusters from 1kW to 50kW in size.

Silvercrest / Submersible Motor Engineering design and build specialized Submersible ROV motors for use SUBSEA in the offshore industry. These motors are usually made to order and vary from 1kW to 600kW, from 400 to 6600 Volts, 50 or 60 Hz, 2 Pole, 4 Pole, 6 Pole and 8 Pole.

We can repair, rewind, rebuild, and redesign any ROV submersible electric motor.

Silvercrest / Submersible Motor Engineering design and manufacture specialized motors for use on SUBSEA equipment used in the offshore industry.

There are two common methods of construction - stainless steel construction or Marine Grade aluminium that is Black anodized to resist corrosion. We can also offer motors manufactured from Duplex and Super Duplex stainless steel.

Our subsea motors are usually oil filled and pressure compensated. The common operating voltages are 400 volts, 3300 volts, 4160 volts and 6600 volts (even for small 5kW motors).

Our motors operate at depths down to 4000 metres, or deeper by special request.

Silvercrest / Submersible Motor Engineering manufactures new Submersible and ROV Motors. SME also services and repairs all brands of Submersible and ROV Motors. Including Hitachi, Pleuger, Grundfos, Mercury, Byron Jackson, Haywood Tyler, and Franklin. Our business is to manufacture, supply and service Submersible Electric Motors, Subsea and ROV motors. With a compliment of 30 service orientated staff members, we have the ability to service and technically support all makes and models of Submersible Electric Motors at our Maddington, Perth facility. Our sales department, with a total of 75 years experience in the Submersible and Electric motor business, are happy to assist with any enquiries on the purchase of Submersible Motors, HPU, and motor-pump sets, ranging from 3.7kw to 1500kw, in various voltages and frequencies.

In our 1200 ft facility, purpose built for manufacture and service of Submersible Electric Motors we offer the following in-house services:

Full Machine Shop capacity.

Voltage Testing through 10,000 volts.

ISO9001 quality assured workshop.

An Overhead crane through 10 ton capacity.

A state of the art Water Pressure Test facility with full international certification.

High POT and Surge Testing.

Full Load / Dyno testing to 250kw of all types of Electric Motors with detailed test reports.

Balancing Facility available, to 250 kg.

SME are a fully integrated manufacturing facility and in addition to our Standard range of submersible motors we also offer the following:

Special Motors for specialist applications.

4 Pole, 6 Pole and 8 Pole motors.

All Stainless Steel or more exotic material construction.

Special Thrust ratings.

Special Lead manufacturing.

NEMA and other couplings in a variety of materials.

Replacement parts of obsolete products.

Technical assistance during Commissioning.

Trouble Shooting.

Repairs to all makes (Oil and Water filled).

Rewinds of all Voltages (200 volt to 6.6kv) with 1 Year Warranty on all rewinds.

Dynamic testing.

Non-Destructive testing.

Welding and Machining.

On site or Factory Based Cable Splicing.

Retro Fitting of Condition Monitoring Equipment.

Modification of existing motors to upgrade them higher specifications.

Refurbishment of ROV motors using more technically advanced materials.

DYNAMOMETER LOAD TESTING.

SME type test their motors with a new 300kW water-cooled eddy current dynamometer with full computer control for accurate load testing.

The submersible motors have to be mounted in a tank for external water-cooling during the testing.

Instrumentation measurements are accurate to within 0.5%. The electrical inputs are measured with a Yokogawa 3 Phase Wattmeter. The measured results are stored on a computer, which is linked to the Yokogawa, and performance results can be calculated using the Summation of Losses Method, or the new IEC Input/Output Method. Results can also be calculated to NEMA Input/Output Standards. SME use a diesel generator to generate the electrical supply for the motor tests and can easily test at 50Hz or 60Hz frequencies.

There is a new 500KVA Voltage Regulator to vary and control the output voltage from 0 to 600 Volts, We can also test at 2300, 2850, 3300, and 4160 Volts.

This facility allows SME to supply accurate full Performance Test Reports on specific motors, rather than generalized Routine or Type Test reports.

Power drive to load using an output shaft with a standard coupling, or, close coupled, etc.

Single drive shaft, or, a drive shaft at both ends, (double shaft extension).

SME can design and build a motor with a completely new lamination to meet special design requirements, if necessary.

SME design their motors so they do not run hot. Typical motors can run on deck for at least 10 minutes on full load, with no cooling, without overheating. The motors are designed to be compact in size and suitable for heavy duty applications, like trenching.

If weight is important SME can design the motor for minimum weight by utilising an aluminium construction and a hollow motor shaft, etc., while still ensuring the motor is generously rated for full load operation. If the motor is going to drive a hydraulic pump we recommend a close coupled arrangement to save the weight of the coupling and the coupling housing.

SME can design and build motors for all voltages from 24 Volts to 4160 Volts with 50Hz or 60Hz frequencies, or for VVVF requirements. High Voltage motors can have random stator windings, or formed coils, depending on space and weight constraints. The winding wire for the High Voltage motors is double insulated and passes a twisted wire test at 16,000 volts and is rated up to 155 Deg.C. All windings are designed to keep 'turn to turn' voltage to a minimum. All winding materials and cables, etc. are specially selected to be suitable for use in hydraulic oil.

In general the SME SUBSEA motors have low loss lamination steel (3 Watts/kg), which allows for higher flux densities, and less heat, with less material and weight.

All motors are oil filled and we recommend hydraulic oils for good lubrication characteristics in preference to electrical oil which has better di-electric capabilities, but worse lubrication capabilities.

If motors are going to drive a water pump SME can design the motor to take the thrust load from the pump, and keep the sea water out of the motor with a single or double mechanical seal arrangement.

Thruster motors can be designed and built for voltage/speed control, which is a relatively simple speed control system, and they can also be built with a thrust bearing incorporated to take the thrust load from the impeller.

To ensure the integrity of the motor housing SME does not use castings. All components are machined from solid or from extrusions. The external aluminium components are typically 6061 T6 marine grade aluminium and hard anodised to a military specification.

All ball bearings are from well known brands such as SKF, FAG, or NSK. Oil seals are high temperature and typically made from Viton. Mechanical seals are typically Burgmann.

All hardware used on SME SUBSEA motors is 316SS.

All fixing holes are blind except the "oil in" and "oil out" fittings and the stator pack fixing bolt, if applicable.

The preferred power cable entry system for SME motors is to use an "oily tube" connected to an adaptor which is part of an oil tight rubber gland which is fixed to the stator frame. SME do not recommend bringing the power cables through the endshields of the motor because this creates additional complications when the motors are stripped down during service, because the endshields cannot be readily removed from the stator. Subsea connectors can be offered as an alternative to the Oily Tube if requested.

SME strongly recommend that the motors are supplied with PT100s fitted in the windings and also in the bearings and that the internal motor temperatures are monitored and set up to alarm if the temperatures rise above the "norm". SME can also offer additional protection with a water detector, etc. The auxiliary connections for PT100s, etc. can be made through standard high pressure, water tight, plug and sockets as supplied by "Subconn", "Impulse", and "Burton". These are also fitted to a connection block on the stator, not on the endshield.

All finished motors are pressure tested to ensure they are "oil tight" and suitable for compensated operation down to 4000 metres.

All motors are rated for continuous operation and all prototype motors are full load performance tested at rated voltage and rated frequency to confirm their performance characteristics. All motors can be issued with a "Type Test Certificate" or even full load tested at additional cost, if required.

SME can also offer to arrange for hydraulic pumps to be set up and tested on the motors at rated voltage and frequency.

SME can offer to supply Hydraulic Power Units, ROV HPU, complete with the addition of a customer specified Hydraulic Pump. Also motor-pump sets for both hydraulic and water jetting applications.

SME is a fully quality assured company to ISO 9001.2000 for "Design, development, manufacture, and testing of submersible electric motors and electric motors for remotely operated vehicles".

SME Subsea motors can be designed and built for all subsea applications, such as ROVs, Trenchers, Ploughs, Submarines, Dredges, etc.

All makes of subsea motor can be serviced, repaired and tested by SME. In some cases the original motors can be significantly upgraded. If you are having problems with your existing subsea motors please contact SME - we are keen to help and we are very price competitive.

At SME we are continually working on improving the performance of our products and for this reason we reserve the right to make changes without notice to any of the data in this brochure.

SUBSEA/ROV MOTORS.

Silvercrest / Submersible Motor Engineering build and repair ROV submersible motors for all subsea applications. We design, manufacture, and supply, submersible electric motors for all SUBSEA and ROV, SUBSEA equipment, also for any special purpose submersible electric motor requirements.

We offer AC thrusters as direct replacements to existing DC thrusters from 1kW to 50kW in size.

Silvercrest / Submersible Motor Engineering design and build specialized Submersible ROV motors for use SUBSEA in the offshore industry. These motors are usually made to order and vary from 1kW to 600kW, from 400 to 6600 Volts, 50 or 60 Hz, 2 Pole, 4 Pole, 6 Pole and 8 Pole.

We can repair, rewind, rebuild, and redesign any ROV submersible electric motor.

Silvercrest / Submersible Motor Engineering design and manufacture specialized motors for use on SUBSEA equipment used in the offshore industry.

There are two common methods of construction - stainless steel construction or Marine Grade aluminium that is Black anodized to resist corrosion. We can also offer motors manufactured from Duplex and Super Duplex stainless steel.

Our subsea motors are usually oil filled and pressure compensated. The common operating voltages are 400 volts, 3300 volts, 4160 volts and 6600 volts (even for small 5kW motors).

Our motors operate at depths down to 4000 metres, or deeper by special request.

Silvercrest / Submersible Motor Engineering design, manufacture, and supply, submersible electric motors for deep well submersible pumps, SUBSEA motors, and ROV electric motors for SUBSEA equipment. Also submersible electric motors for all your special purpose submersible electric motor requirements. We offer a complete motor repair and rewind service for all name brands of submersible motors, both water and oil filled.

ROV motors for new underwater vehicles, ROVs, and for all subsea applications.

We repair, service and rewind all existing submersible motors (from any company).

Our submersible, subsea and ROV motors are designed and engineered to the highest specification, with a precision fit. Strict quality controls ensure long service life, and proven subsea service.

Motors can be engineered and designed to exactly you’re your specific applications and requirement.

Our motors can be both water and oil filled.

We design and manufacture special application submersible motors for specific requirements.

SME has many years of experience with the design and manufacture of submersible motors, used in the offshore and dredging industries. This experience has resulted in SME being the company of choice as a manufacturer and supplier for many of the major offshore subsea companies

SME submersible motors are specially designed to suit customer requirements. With special attention being paid to the motor design. Resulting in SME manufacturing rugged motors with low maintenance requirements, a very high reliability, and a long service lifetime. Low speed designs are available up to 1.0 MW leaving out the need for a gearbox.

SME submersible motors have a generous overload margin with solid lamination, windings and rotor design. The SME submersible motor can be oil filled. Hence no re-greasing of the bearings is required. The oil filling also prevents condensation of water inside the motor. Cooling of the motor can be either by natural cooling or forced cooling by the surrounding seawater.

The following instrumentation is available:

Stator temperature measurement, Bearing temperature measurement

Oil temperature measurement

Pressure difference transmitter Seawater / Oil

Water leakage detection in auxiliary connection boxes

Factory load test

Horizontal or vertical mounting of the motor.

SME offer a Repair and Re-conditioning service for your used submersible electric motors. In addition to the manufacture of new submersible motors, we also carry out maintenance, repair and re-conditioning of submersible motors of our own design and third party motors. After Sales Support . Maintenance, repair and overhaul of large electrical motors of any make and type.

The Engineering Department is to be consulted immediately if any Stators fail a test.

If the polarization Index is less than 2, consult the Engineering Department.

Pass/Fail criteria are based on IEC standards, IEEE Standards, and the Baker Surge Test Manual.

Test motor with a full set of BJM tests and record the results.

No Load Running.

Run Motor on No Load - preferably in the Vertical position.
Adjust voltage and frequency to match Nameplate voltage and frequency.
Record: Voltage on all 3 phases, amps on all 3 phases, RPM, Vibration Levels at DE and NDE in both planes, time motor takes to stop after power off.

Compare results with standard figures and other similar motors. Advise Engineering Department immediately if there is a discrepancy.

On a correct installation the motor frame is earthed. Water is a good conductor of electricity. As soon as a circuit is established between the water in the bore and the power supply cables, current will flow through this fault causing unbalanced currents in excess of normal Full Load Current (FLC). If the motor is not disconnected from the supply immediately catastrophic damage will be caused to the windings due to overheating because of high currents.

The magnitude of the current flows will depend on the level of insulation to earth. Sometimes these faults are not solid connections to the water or to earth, i.e. there is still a high insulation level to earth, which restricts the current flow to earth. In this case the Earth leakage and/or overload protection may not trip immediately and the motor windings still overheat due to the unbalanced currents.

Evidence of Water in the leads.

When the motor leads or drop cables are cut, water drains out when the leads are held up in the air and the recently cut end is left hanging down.
Stator winding are overheated usually causing multiple earth faults in the windings.

Submersible Motor Engineering motors have been extensively tested and used with modern GTO and IGBT VVVF Drives, however, care must be taken to ensure reliable and satisfactory operation. Please pay attention to the following guidelines.

Accurate and Calibrated Quick Trip overloads must be installed and set to trip if the current in any phase exceeds the full load current.

The motor should not be operated continuously at less than 70% of Synchronous Speed - 3000 x .7 = 2100 RPM for a 50 Hz 2 pole motor, or 1500 x .7 = 1050 RPM for a 50Hz 4 pole motor.

Cooling water flow past the motor must exceed 15 cm/sec or 0.5 feet/sec at all times and under all operating condition except during Start Up, however, water flow should not exceed 300 cm/sec or 10 feet/sec as this can also create an overheating condition.

The VVVF Drive must be set up to supply a constant linear Volts to Hertz ratio, i.e. at 25 Hz the Voltage should be 207 Volts for a 415 V 50 Hz motor.

The output of the VVVF Drive should be filtered to reduce harmonics. The output power should be balanced, free of High Voltage Transients, and harmonics, and within the rated voltage and frequency of the motor.

Operation at reduced speed can cause overheating. Operation with a long Run Up time can cause problems in the Down Thrust bearing, due to insufficient lubrication between the Pivot Shoes and the Carbon Thrust Bearing Disc. Other operating requirements still apply as specified in Submersible Motor Engineering Installation and Maintenance Procedures.

Overheating in Submersible Motors

The most common cause of failure in a Submersible Electric Motor is Overheating, as this causes the insulation materials in the motor to deteriorate until failure occurs. Sometimes the overheating can introduce other problems in the motor, before it fails, which accelerates the process.

The most common causes of overheating are as follows:

Overloading.

High ambient water temperature.

Low flow rate of external cooling water.

Very high flow rate of external cooling water.

Low Supply Voltage.

High Supply Voltage.

Incorrect Installation Procedures.

Voltage and Current Unbalance.

Voltage surges and Spikes.

Single Phasing.

Phases Reversed.

Build up of organic or mineral material on the outside of the motor.

Rapid cycling - switching the motor on and off frequently and quickly.

Incorrect Ramp Up time when using a Soft Starter ¨C Maximum 4 seconds is allowed. DU has a separate bulletin covering the use of submersible motors with VVVF Drives and Soft Starters.

The Effects of Overheating on different parts of the motor are as follows:

Internal Cooling Fluid. The fluid will boil which will create steam inside the motor at high pressure. The steam will force it's way out of the motor, past the lip seals on the DE, or the Mechanical seal on the DE, or it can rupture the rubber bellows on the NDE. Steam will not transfer the heat from the internal components such as the stator windings or the rotor.

Stator Windings. Without efficient heat transfer in the cooling fluid the insulation will breakdown and short circuits and or earth faults will occur. If the fault is violent other parts of the motor can be damaged such as the lamination stack.

Bearings. The carbon sleeve bearings and thrust bearing will fail very rapidly without efficient fluid lubrication. Usually this occurs first in the upper sleeve bearing and leads to binding, rapid wear, and misalignment for the pump and the rotor.

Rotor. If the sleeve bearings wear sufficiently this can allow the rotor to rub against the stator, which is called ¡°poling¡±. This will cause localized high temperatures, and mechanical problems, that will quickly lead to catastrophic failure of the motor. It is quite common for some of the stator teeth to be dragged into the stator slot and cut through the wires in the stator winding, creating an earth fault.

Bellows or seals may deteriorate and rupture allowing the external fluids and foreign matter to enter the motor. The foreign matter can be abrasive, which will encourage wear if the motor continues to run.

Casings and Housings. In extreme situations it may be possible for the casing of the motor or the end brackets to warp and cause misalignment.

If the motor is subject to electrolysis, or bacteria build up, this can accelerate due to higher temperatures, which in turn will cause even higher temperatures.

Possible Reasons for Overheating

Overloading is usually caused by:

Excessive hydraulic load.

An oversized, or wrongly sized, pump fitted to the motor.

Misalignment.

Binding.

Failure of a component in the motor or the pump,

Foreign bodies, or solids, in the water being pumped.

Over frequency. Motors must be correctly selected to match the pump and the duty required.

If a motor is powered from a Generator Set, rather than the mains of a power utility it is possible that the supply frequency is higher than motor/pump design frequency. The characteristics of normal pumps are very sensitive to speed. Increased speed due to increased frequency will almost certainly raise the duty point of the pump and this can cause the motor to be overloaded.

Overloading of a motor will almost certainly cause overheating, however, overheating will not necessarily cause overloading.

High Ambient Water Temperature

Submersible Motor Engineering specify the maximum ambient water temperature, the minimum cooling water flow in m/sec, and the maximum full load output power for the motor. All of these conditions can vary in practice and this will affect the ability of the motor to dissipate the internal heat that is generated by the motor in operation. If the motor overheats because the maximum ambient cooling water temperature is exceeded the life of the motor will be reduced.

Low/High External Cooling Water Flow

The motor relies on the efficient transfer of heat from the external surface of the motor to the water flowing past the motor. If the flow is too slow the external water will heat up and create a similar condition to having a high ambient water temperature. Low flows are usually caused by:

Low Pump flow rate.

Incorrect application or design.

Plugged or blocked suction inlet.

Loss of suction.

Closed or blocked discharge.

Low pump speed.

Loose impeller or impellers.

Water flow into the pump from above the motor.

Motor installed below the well screen.

Pump suction inlet set at the same level as the well screen.

Large gap between the motor and the well liner.

Obstruction around the motor.

Motor buried in sand or silt.

Motor/Pump installed without a shroud in a tank or pit.

Motor/Pump installed in water with a very high concentration of Oxygen. If the external cooling water is flowing too fast it may form a recirculating or turbulent layer along the surface of the motor. This layer may prevent the external surface of the motor from being able to dissipate the heat fast enough to cool the motor. High velocity flow conditions also cause a decrease in pressure which may cause dissolved minerals to precipitate out of the water forming a mineral plating on the surface of the motor which will also act as a form of thermal insulation and reduce the cooling capacity even further.

In some wells bacteria will grow on the external surface of the motor ¨C in extreme cases this can be a much as 10mm in 3 months. This bacteria growth also acts as thermal insulation and as it grows out towards the well liner it will force the external water flow rates to increase as the gap between the well liner and the bacteria surface on the motor reduces eventually causing excessive flow rates.

Low/High Voltages

Low voltages will lead to increased currents, as voltage and current are generally proportional if saturation effects are neglected. Increased currents will lead to increased heating in the stator winding. Low voltages will also lead to lower full load speed and increased slip. The pump will have a reduced performance leading to reduced water flow past the motor and possibly reduced cooling capacity.

High voltages will lead to a reduced stator current, until the voltage is sufficiently high that the lamination iron starts to saturate, at which point the current will start in increase leading to increased temperature rise. High voltages will also cause the motor to have increased starting torque and increased starting current, which will probably lead to higher temperatures during starting.

Incorrect Installation Procedures

The pump and motor must be assembled correctly. Any Misalignment or Binding can cause overloading of the motor.

Misalignment occurs when components are not machined correctly or not assembled correctly. All the components in the motor and the pump must be concentric within the tolerances specified by the manufacturer. Special attention must be paid to component fits, the balance and vibration of rotating components, clean assembly conditions with no foreign objects or matter in the assembly,

Binding is usually caused because there is insufficient room for axial or radial movement in the pump or because the shaft coupling is not fitted correctly. The coupling should not be pinned or fixed with a grub screw to the motor shaft ¨C it should be free to slide on the shaft to allow for thermal expansion of the motor shaft.

All water filled motors must be correctly filled prior to installation as the motor relies on this water to remove the heat generated in the water. If a motor is not properly filled there is a strong possibility the motor will overheat.

Great care must be taken during installation to ensure that whole motor/pump assembly is not damaged. Special care must be taken when lifting the motor/pump to the vertical position prior to lowering down the hole. Make sure the shaft is not subjected to excessive bending forces, which can bend the shaft.

Voltage and Current Unbalance

This is probably the single most common cause of motor failure. Generally this is caused by voltage imbalance, leading to current unbalance. Unbalanced currents will definitely lead to increased temperature rise in the stator winding. If the motor is fully loaded ¨C not de-rated ¨C it will almost certainly lead to stator windings exceeding safe temperature limits.

DU has a separate bulletin especially covering Voltage and Current Unbalance.

Voltage Surges and Spikes

A High Voltage Surge is when the supply voltage increases substantially for a period of milliseconds or seconds. A spike occurs when there is a very high voltage transient for nanoseconds or milliseconds.

A surge is quite likely to occur when a generator supplying a motor runs out of fuel. When the fuel mix becomes very lean the engine speeds up and the output voltage from the generator increases. Spikes are usually caused by the switching of electrical equipment on the supply system ¨C not necessarily the actual contactors or circuit breakers operating the motor. Very large surges or spikes can be caused by indirect lightning strikes on the supply system.
This is a complex subject, however, in general, small voltage increase/short duration surges will tend to stress the windings causing gradual deterioration over a period of time, and eventually catastrophic failure of the windings.

Large voltage increase/long duration surges will severely stress the winding and connection points ¨C the weakest point in the winding or connections will fail usually causing a short circuit which can have enough energy to blow a hole in the lamination pack or even through the stator casing.

Small spikes will stress and degrade the windings and connection, while a large spike will almost certainly lead to immediate catastrophic failure.

Single Phasing

Single phasing occurs when 1 phase of a 3-phase supply is lost, i.e. there is no voltage on one phase.

In a Delta connected motor current will continue to flow in all 3 phases of the winding, but extremely high currents will flow in the phase connected directly between the 2 remaining voltage connections ¨C this phase will overheat and fail very quickly if the motor is not shut down very quickly.

In a Star connected motor current will continue to flow in the 2 phases connected between the 2 remaining voltage connections ¨C these 2 phases will overheat and fail is this condition is not detected very quickly and the motor disconnected from the supply.

If the motor is not operating and is switched on to a Single Phasing supply it will almost certainly not start and will draw high starting current as described about until it is disconnected. If the motor is already running and 1 phase drops out for whatever reason the motor will probably continue to run at reduced speed while drawing heavy current.

Phase Reversal

Phase reversal will result in the motor running in the wrong direction and in general the pump will operate very inefficiently, probably not drawing enough water past the motor to cool it properly.

Build up or organic or mineral material on the outside of the motor

Organic deposits are usually caused by iron bacteria. These bacteria produce a layer, or crust, of iron and/or magnesium compounds on the outside of the motor. These encrustations act as a thermal barrier and contain the heat within the motor. The presence of iron bacteria is usually a pre-existing condition.

Mineral deposits will cause the same type of thermal barrier as organic deposits. Chemical reactions precipitate the minerals present in the water and deposit them on the external surface of the motor. The most common mineral deposits are carbonates, iron, manganese, and silicates.

Rapid Cycling

Rapid cycling causes the motor to overheat, as it does not get sufficient time to cool down from the previous start/run. When a motor is started it draws 4 to 6 times the normal full load current. This increased current creates high temperatures in the stator and rotor windings. This is especially a problem if the motor is already hot because it has been operating at its nominal full load temperature. Several starts in quick succession will almost certainly cause the motor to overheat which will cause a degradation of the stator winding insulation and other internal components. Eventually the deteriorated conditions inside the motor will cause it to fail.

DU recommends that motors be allowed to cool for 15 minutes before being restarted. In some circumstances motors may require even longer to cool down, especially if the ambient water temperature is high.

DU also recommend that a motor is allowed to run for about 1 minute after start up to allow the heat generated during the starting cycle to partially dissipate.
The whole installation should be designed to keep the number of starts required by the motor to a minimum, which will increase the life of the motor.

Summary

Motor overheating is usually a symptom of other problems. Failure to investigate and determine the true reason for the overheating will lead to motor failures, extended down times, repeated repairs, and higher maintenance costs.

Unbalanced Currents and Submersible Motors

One of the most common causes of failure in Submersible Electric Motors is because of overheating due to unbalanced currents, usually caused by unbalanced voltages. IEC Report 892:1987 (AS1359.31 1997) states: "The application of unbalanced voltages to a three phase induction motor introduces a "negative sequence voltage", and this produces in the air gap a flux rotating against the rotation of the rotor, thus tending to produce high currents. A small negative sequence voltage may produce currents in the windings that are considerably in excess of those present under balanced voltage conditions. Consequently the temperature rise of the motor operating on a particular load and percentage voltage imbalance will be greater than for the motor operating under the same conditions with balanced voltages." This applies for all induction motors, but is especially critical for submersible motors because they operate at much higher current densities than standard air cooled motors and have a much lower tolerance to increased temperatures. If voltages are unbalanced then currents will almost certainly be unbalanced. Even if the voltages are balanced it is possible to have large current unbalance - if this is the case it is usually caused by the way the drop cables are arranged in the well. For example, we recently helped a customer experiencing 20 amps current unbalance with a 150Hp 8 Inch motor on full load, when the voltages were balanced within 1 volt at the surface. The drop cables had been tied to the flexible column with 2 phases on one side and 1 phase and the earth cable on the other to give a better mechanical balance. When the cables were rearranged with the 3 phases tied together on one side and the earth on the other side the currents were balanced within 2 amps. This large variation in current was caused by magnetic field linkage and interaction between the 3 phases, which was amplified over 250 metres of cable down the hole. We can expect increased, uneven, and localised heating in a motor because of unbalanced currents, so it is essential to ensure that the voltages and currents are balanced when motors are commissioned. If the voltage supply to the motor is solid and stable the currents will probably remain reasonably balanced, however, on some sites, such as mine sites, large variations can occur during the day as different parts of the plant are operated and alter the supply conditions. In this type of supply environment SME strongly recommend that voltage and current unbalance protection is included in the motor protection system. Voltage unbalance is more common in rural areas where there can be large single-phase loads, which unbalance the supply. To get an idea of the effect of voltage and current unbalance; for 1% voltage unbalance we can expect about 8% current unbalance and 10% increase in temperature rise. The correct way to calculate the percentage Current unbalance is to use the formula below:

Percentage Current Unbalance = (Maximum current difference from average current / average current) x 100

Procedure.

Measure the currents in all 3 phases.

Add the 3 measured currents and divide the total be 3, which gives the average current.

Calculate the amps unbalance for the worst phase by subtracting it from the average.

Divide the worst-case unbalance amps by the average and show as a percentage. This figure is know as the Percentage Current Unbalance and it should not be more that 5% for SME motors. (Most manufacturers do not allow more that 5% current unbalance).

Example:

Currents measured are 34, 36, and 40 amps.

The total of the 3 currents is 110, and the average is 36.67 amps.

Worst Case unbalance is 40 - 36.67 = 3.33.

Current Unbalance is 3.33 / 36.67 = 9%

A motor seldom has completely balanced currents even if the voltage supply is balanced so in some cases it is possible to balance the currents by rotating the motor connections. This should be done by moving all 3 connections in the same direction each time so that the direction of rotation of the motor is not changed. The currents should be recorded for each phase with reference to the supply and motor terminals. All 3 connection options should be tried and then the connection that gives the best result should be used.

If there is still significant current unbalance after the current unbalance has been reduced to a minimum by rotating the phases then it may mean considering de-rating the motor. This either means reducing the pump output by fitting a smaller pump or maybe by removing an impeller, or installing a larger motor. 5% current unbalance probably means that there is about 0.8% voltage unbalance.

As an alternative to derating it is possible to measure and monitor the actual temperatures in the motor using PT100s. SME fit 3 PT100s in the windings and in the slot as standard for all motors 8 Inch and above. In general SME will know where the winding hot spot is for different motors and they can then advise if it is safe to operate the motor when the actual temperatures are known, even if there is high current unbalance. In some cases the ambient water temperature may be low, or, the motor is not fully loaded by the pump, so the actual winding operating temperature will still be well within acceptable limits.

Current unbalance in an induction motor has a number of effects, which reduce the performance of the motor, but the most significant for submersible motors is the increase in temperature.

Any installation with more than 5% voltage imbalance is not suitable for use with submersible motors or any type of induction motor. The supply authority needs to fix the problem.

Thrust Bearings in SME Submersible Motors.

All SME submersible motors are fitted with Kingsbury type Hydrodynamic Self Adjusting Tilting Shoe Thrust Bearings to take the axial "down thrust" from the pump. These are a complex and clever part of a reliable submersible motor and probably not understood very well.

These thrust bearings will take a surprisingly heavy axial "down thrust" load and provided that they have been installed correctly, rated correctly, and looked after properly, they will provide may years of trouble free operation.

SME motors also have an "up thrust" bearing to take thrusts - usually these occur at start up while the discharge pipe work is filling. The "up thrust" can be significant if pipe work is long between the pump and the surface and the Non Return Valve (NRV) has been drilled to allow the column to drain. While the column is filling there is a large momentum force upwards, and the head, acting down, is low, and the pump is quite likely to be operating beyond its Best Efficiency Point (BEP). The "up thrust" tends to be heavier with closed type impellers. On some pumps the thrust will reverse just after the BEP.

SME recommend that pumps should be operated according to the pump manufacturer's recommendations. Pumps should have a means of accommodating temporary "up thrust" and the splined couplings between the pump and the motor should not be grub screwed.

The "up thrust" bearing in the motor is a fairly simple device, which consists of a resin/cloth fibre ring, which rubs against the underside of the Stainless steel Thrust Bearing Support plate. These bearings are not continuously rated and only take light loads.

Principle: The Hydrodynamic thrust bearing transmits the rotating shaft's axial thrust load to the frame of the motor, which is mechanically supported in the well.

The axial thrust load is transmitted through the bearing on a self-renewing film of lubricant, which is water in most SME motors. The pressure in the fluid film supports the load without the thrust disc or pivot shoes making contact.

Theory: Due to viscosity, fluids tend to stick to surfaces, and in the case of Kingsbury type thrust bearings, they rely on the fluid sticking to the surface of the rotating thrust disc. The fluid is dragged circumferentially as well as being thrown outwards by the rotating disc. At the leading edge of the pivot shoes, a continuous fluid wedge will form. When the right conditions exist the wedge will produce sufficient lift to create a physical separation between the thrust bearing disc and the face of the pivot shoe. At this point a true fluid film (TFF) is said to exist.

TFF is essential for the successful operation of the thrust bearing. When the bearing is operating correctly there is no contact at all between the disc face and the face of the pivot shoes. The only time there is contact is when the motor is stopping or starting. This brief contact period means there should be only negligible wear between the faces - and no wear while the motor is operating.

The adjacent sketch shows how the pivot shoe tilts over and allows the fluid to be forced between the carbon thrust disc and the face of the pivot shoe by a combination of rotational drag and centrifugal force. The pivot point should be spherical which allows the shoes to rotate or pivot so that the fluid can form a wedge. The shoes need to be loosely constrained while still free to pivot.

The carbon thrust bearing drags the fluid around in a circular direction, but this fluid also experiences a centrifugal force, which is pulling the fluid towards the circumference of the bearing. The combination of these 2 forces means that the fluid is circulating and going outwards at the same time and it has been found that the peak pressure point is somewhere beyond the centre in the direction of rotation. Quite often this is assumed to be on the face of the pivot shoe approximately 75% across the face of the pivot shoe and 75% out towards the circumference. This is known as the 75/75 Rule in Thrust Bearing design and is where the bearing has peak loading, minimum film thickness, and high temperatures. If the thrust bearing only operates in one direction it is common to offset the pivot point so it is nearer to the 75/75 point.

From the Pressure Distribution Curve it can be seen that peak load is not on the centre line of the pivot shoe, but offset in the direction of rotation.

Issues that need to be considered during the design of a hydrodynamic thrust bearing are maximum total loads, load per mm2 on the bearing surface, number of shoes, thrust disc surface speed, fluid viscosity, and maximum allowable fluid temperature. Hydrodynamic thrust bearings commonly have 6 or 8 pivot shoes because of the difficulty of ensuring that all the shoes share the load evenly. More shoes increase the likelihood of uneven loading because of variations in dimensions due to mechanical tolerances.

The thrust-bearing disc transmits the axial thrust load from the rotating shaft (rotor) through the fluid film to the stationary pivot shoes. A typical film thickness under rated thrust load can be 0.03 mm for a high performance thrust bearing.

Other Issues:

Cleanliness.It is very important that the inside of the motor is very clean with no loose material that could circulate in the water. All the Thrust Bearing components should be ultrasonically cleaned prior to assembly as any lapping paste that is not removed from the pivot shoes or the carbon disc will tend to circulate in the fluid. (Pivot shoes should also be demagnetised after grinding and lapping to ensure they do not attract any magnetic particles that might be present. Any foreign material, larger than the film thickness, that passes through the thrust bearing can damage the surface of the carbon surface of the thrust disc and can get imbedded in the surface of the carbon. (It is unlikely to scratch the face of the pivot shoes as these are specially hardened). Any water that is used to top up inside the motor should also be clean, but most tap water is fine.

Surface Finish and Tolerances.It is essential that the surface of the carbon thrust-bearing disc is machined flat and exactly perpendicular to the shaft with negligible run out on the face. The surface must be lapped to give a very smooth flat finish. The surface of the face of the pivot shoes is also ground and lapped to give a very smooth flat finish, and in addition the height of each pivot shoe in a set must be identical and the base of the pivot leg must be spherical so that the pivot shoes are free to pivot and share the load equally. Due to mechanical tolerances there will always be some variations in dimensions, but in general they should be tightly controlled. The design of the SME thrust bearing allows the whole thrust bearing assembly to swivel on the thrust button, which also allows the pivot shoes to share the load more evenly.

Speed of Rotation.It is important that thrust bearings are not operated at low speeds, or speeds well below their design operating speed. At the low speeds there will not be enough rotational speed to force the fluid through between the pivot shoe faces and the thrust disc, so the faces will be in contact as the motor rotates and this will lead to wear and heat generation due to friction. This can be a problem when using VVVF drives or soft starters and we recommend a maximum run up time of 4 seconds. It can also be a problem when the motor is switched off as the water in the column could flow back down through the pump in the reverse direction and cause the pump to rotate which will cause the bearing to rotate at a low speed. In most installations a check valve is fitted just above the pump, which will prevent this from happening, even though it is quite common for a small drain hole to be drilled in the check valve to allow the column to drain slowly after the motor/pump is switched off.

Temperature. The temperature of the fluid inside the motor can have a big influence on the performance of the bearing because the viscosity of the fluid will change with temperature and if the water temperature gets close to boiling point the water will loose all it’s viscosity and the bearing will fail. Because the TFF will not be maintained, sliding contact between surfaces will occur and wear will increase.

Lubrication and Film Thickness.For the bearing to operate properly the lubricating fluid must always be present between the carbon thrust disc and the faces of the pivot shoes. This fluid heats up as it passes through between the 2 faces of the bearing and needs to be cooled and recirculated before it passes through the bearing again. The fluid entering the bearing should always be reasonably cool before it enters between the bearing faces so it can cool the bearing as it passes through.

Shock Loading. This can occur when a pump starts to cavitate. These bearings will tolerate some shock loading, provided the peak shock load does not exceed the maximum load the bearing can take. If the maximum load is exceeded the carbon will make contact with the pivot shoes and high wear and high temperatures will result. In extreme cases the carbon will be pounded onto the pivot shoes and will then disintegrate.

Load distribution to the pads/pivot shoes. It is essential to ensure that the height of each pivot shoe is exactly the same so that each pivot shoe shares the load evenly. If one shoe is shorter than the other shoes then it will have a bigger gap between the face and the carbon and will not carry as much load as the other shoes. Likewise if one shoe is higher than the other shoes it will tend to carry a much higher load than the other shoes. (Please note that even if the load is not exactly evenly distributed across all the shoes in the thrust bearing it will still work, because all SME bearings are very conservatively rated).

Pressure Distribution in the film I Flow Requirements across the bearing. As the thrust load increases the pressure in the gap between the pivot shoes and the carbon will reduce. Any small scratches or indentations in the surface of the pivot shoes or the carbon will reduce the load carrying capacity, as some of the pressure in the fluid will be dissipated into these “voids”. It is essential that fluid inside the motor is free to circulate through the bearing and mix with the fluid around the bearing to dissipate the heat generated in the bearing.

Power Losses.As the thrust load increases on the bearing the power loading on the motor will increase. There is a direct linear relationship between the power consumed in the bearing and the thrust load. Typically for a 6 shoe 8” SME thrust bearing with 3000 Kg of “down thrust” the extra power required from the motor is 900 watts. This power is dissipated in heating the fluid and bearing surfaces.

Testing Thrust Bearings:

SME have recently commissioned a new Thrust Bearing Test rig, which will allow us to test different bearing designs and different materials, especially for the thrust disc. We recently tested a standard 6 shoe 6” bearing for 120 hours at 2500 kg and found no measurable wear on the face of the thrust disc or on the face of the pivot shoes. The load was increased in steps until the bearing failed at 4620 kg load. We rate this bearing at 2270 kg in a standard 6” motor.

Overload Settings and Temperature Protection

At SME we are committed to assisting our clientele to improve their level of expertise and understanding of the protection for submersible motors.

It seems to us that most electricians set the current overload protection about 5% above the nameplate full load current, regardless of the current the motor is actually drawing when it is operating, which will not protect the motor if it is only loaded to 70% of the nameplate current.

After the first few days of operation, submersible pumps and motors, tend to settle down and draw the same current for days, months, years - until something changes. Sometimes the load will fluctuate a little with irrigation applications, or supply voltage variations, etc., but generally the current will not vary.

In our opinion to protect the motor and pump the owner/operator needs to know when something changes so they can investigate that change. Quite often the reason for the change can be found on the surface and fixed very easily. A recent example we know about was a diesel generator that had sped up and was generating at 55Hz instead of 50Hz.

SME recently supplied a 300Hp 4P 14” motor with a nameplate current of 431 amps and the actual duty point current was 320 amps. The site electrician decided to set the current overloads to trip the motor at about 430 amps, which they did, after there had been a catastrophic failure. The motor only ran for 20 hours, and the pump and motor were then out of action for 4 weeks while everyone involved argued about what had happened and then agreed to get the motor fixed, which involved rewinding and rebuilding. We are certain that if the overloads had been set to 330 amps they would have tripped and alerted the owner that there was a problem. There is a reasonable chance that the reason for the trip could have been identified and fixed. Failing that, the motor could have been operated and monitored very closely. If the current had kept rising it would have indicated that something was seriously wrong and the motor and pump could have been pulled before there was a catastrophic failure. This would have reduced the down time that the pump was out of service, and reduced the costs to everyone involved.

This motor was also fitted with 4 x PT100 temperature detectors which were not connected and therefore not protecting the motor.

All SME motors are supplied with 1 PT100 in the DE Windings as standard and all motors of 100Hp or more are fitted with 4 PT100s as standard and customers are free to order additional PT100s in smaller motors, if they want.

At SME we confidently believe that a combination of “Quick Trip” current overloads and PT100 temperature monitoring will give end users a lot of comfort that their motors are operating properly, and if something does change, alert the end user that there is a problem before it is catastrophic.

There are 2 recent examples that we are aware of, where temperature monitoring has more than paid for the additional cost of installation.

A 60Hp 8” High Temperature oil filled motor was supplied to the Water Corporation of WA for a bore that has a big problem with Iron Bacteria growth. Typically the growth is about 10mm thick after 3 months of operation and most standard motors have to be pulled up and cleaned every 3 months to prevent them over heating. The new SME motor has 4 PT100s fitted and monitored and the Water Corporation can monitor the temperature in the motor, which has settled down at about 76 Deg.C. The motor has been operating for about 9 months and there is no plan to pull it up until a problem develops. In theory the winding temperature can be allowed to increase to 120 Deg.C. before we would consider that it is too hot. (The oil in this motor has been specially approved by the West Australian Health Department as safe to use in drinking water).

A 250Hp 4 Pole 14” motor on an offshore oil platform, was fitted with 4 x PT100s, which were all being monitored continuously. This motor was subjected to very high thrust loading, possibly as high as 7000 Kgs. Due to a misunderstanding during testing each of the valves in the system were closed one at a time while the motor was still running. Luckily the Thrust Bearing PT100 detected a rapid increase in temperature from 46 Deg.C. to 95 Deg.C. and shut the motor down before there was any catastrophic damage. It was decided to check the condition of the thrust bearing after this episode and it was found to be damaged and was replaced.

In summary we urge all our customers to try to ensure that the current overload protection is set just above the steady state current during operation, and to install PT100 monitoring equipment, which we can supply, and advise on at a very attractive cost.

Company Profile:

Submersible Motor Engineering manufactures new Submersible and ROV Motors. SME also services and repairs all brands of Submersible and ROV Motors. Including Hitachi, Pleuger, Grundfos, Mercury, Byron Jackson, Haywood Tyler, and Franklin. Submersible Motor Engineering is a 100% owned and operated Australian company. Our business is to manufacture, supply and service Submersible Electric Motors. With a compliment of 30 service orientated staff members we have the ability to, service and technically support all makes and models of Submersible Electric Motors at our Maddington, Perth facility. Our sales department, with a total of 75 years experience in the Submersible and Electric motor business, are happy to assist with any enquiries on the purchase of Submersible Motor Engineering Products ranging from 3.7kw to 1500kw, in various voltages and frequencies. With Representatives in most Global markets SME are able to provide a global presence but with local service.

In our 1200 ft facility, purpose built for manufacture and service of Submersible Electric Motors we offer the following in house services:

Full Machine Shop capacity.

Voltage Testing through 10,000 volts.

ISO9001 quality assured workshop.

An Overhead crane through 10 tone capacity.

A state of the art Water Pressure Test facility with full international certification

Our motors and HPU’s are ideal for driving thruster systems, also excavation and hydraulic tools that require high power inputs. Our submersible motors can also be used to drive other types of rotating machinery, such as water pumps for trenching machines.

Motor winding temperature and water ingress sensors are included.

High Reliability

Industry Proven Windings

Water Ingress and Temp. Sensors

Various Voltage Options (3300vac , 4160vac and 6600vac)

Interface Kits for a Range of Hydraulic Pumps

Motor Options for Pump Drives with a range of shaft speeds.

High efficiency submersible motors and HPU’s, for all subsea, ROV and trencher operations. The perfect power source supply for ROVs, Trenchers, TMS, and subsea tooling applications. These motors are usually made to order, and vary from 1kW to 600kW, from 400vac to 3300vac, 4160vac, and 6600vac, 50 or 60 Hz, 2 Pole, and 4 Pole ( 8 Pole and 10 pole available by request). There are 2 common methods of construction - stainless steel construction or Marine Grade aluminium that is Black anodized to resist corrosion.

These motors are usually oil filled, and pressure compensated. Our motors operate at depths down to 4000 metres.

Our business is to manufacture, supply and service Submersible Electric Motors. With a compliment of 30 service orientated staff members we have the ability to, service and technically support all makes and models of Submersible Electric Motors at our Maddington, Perth (WA) facility. Our sales department, with a total of 75 years experience in the Submersible and Electric motor business. We are happy to assist with any enquiries on the purchase of all Submersible Motor Engineering products, ranging from 3.7kw to 1500kw, in various voltages and frequencies.

We manufacture, repair and rewind large high voltage (500kW, 6600V) submersible electric motors.

Water can enter the supply cables to a Submersible Motor if there is damage to the cable insulation or if the spliced joints have not been made completely watertight. If this happens there will probably be catastrophic damage to the windings due to high currents flowing through the windings.

Likely Causes

1. Spliced joints between Drop Cables and Motor Leads not terminated correctly and not properly sealed against water entry. Spliced joints not "watertight".

2. Insulation damage to Drop Cables or Motor leads which allows water access. Great care must be taken to protect the cables and prevent damage during installation of the motor and pump.

On a correct installation the motor frame is earthed. Water is a good conductor of electricity. As soon as a circuit is established between the water in the bore and the power supply cables, current will flow through this fault causing unbalanced currents in excess of normal Full Load Current (FLC). If the motor is not disconnected from the supply immediately catastrophic damage will be caused to the windings due to overheating because of high currents.

The magnitude of the current flows will depend on the level of insulation to earth. Sometimes these faults are not solid connections to the water or to earth, i.e. there is still a high insulation level to earth, which restricts the current flow to earth. In this case the Earth leakage and/or overload protection may not trip immediately and the motor windings still overheat due to the unbalanced currents.

Evidence of Water in the leads.

When the motor leads or drop cables are cut, water drains out when the leads are held up in the air and the recently cut end is left hanging down.
Stator winding are overheated usually causing multiple earth faults in the windings.

Submersible Motor Engineering cannot accept warranty if water is found in the leads.

Silvercrest/SUBMERSIBLE MOTOR ENGINEERING are pleased to be able to offer a complete range of submersible motor systems to meet the demanding requirements of the ROV, sub-sea trenching, and manned submarine industries.

Rov and Subsea Plough motors.

Silvercrest/SUBMERSIBLE MOTOR ENGINEERING offer an established range of ROV motors ranging from 5HP to 600HP.

All of these motors are available in either SS316 or Hard Anodized Aluminium finish.

We will also design and build submersible motors to suit your individual requirements and subsea project.

Our motors are in use with most of the major operators worldwide such as Saipem, Sonsub, CTC Marine Projects, Fugro, Thales, MTQ, LD Travocean and Canyon Offshore.

Silvercrest/SUBMERSIBLE MOTOR ENGINEERING also completed the installation of our 69kW (6 x 11.5kW) AC propulsion and ballast system into one of the Odyssey class tourist submarines in Southeast Asia.

Silvercrest/SUBMERSIBLE MOTOR ENGINEERING can offer a range of ‘standard’ motors for use in well-established underwater installations, such as the more popular classes of Rov and subsea ploughs.

Refurbishment of ROV motors using more technically advanced materials.

Submersible and Rov motors.

We service and repair all brands of Submersible and ROV motors. Including Hitachi, Pleuger, Grundfos, Mercury, Byron Jackson, Haywood Tyler, and Franklin.

Our sales department, with a total of 75 years experience in the submersible and electric motor business, are happy to assist with any enquiries on the purchase of submersible motor engineering products ranging from 3.7kw to 1500kw, in various voltages and frequencies.

ROV / TRENCHING REPLACEMENT MOTORS.

We offer a standard range of direct replacement motors, designed as a direct replacement fit into many of the more popular ROVs and trenching systems in use today (for example, the Perry, Hydrovision and Slingsby underwater systems).

We recently completed the design of a 290HP / 3000VAC trenching motor for use in subsea trenching operations.

Our standard ROV / Trenching Replacement Motor Range include:

75HP Sunn Star replacement.

100HP Sunn Star replacement.

125HP Sunn Star replacement.

75HP Fowler replacement.

100HP Fowler replacement.

100HP Curvetech replacement.

MANNED WET and DRY SUBMARINE PROPULSION SYSTEMS.

Historically, over the last fifteen years electrical submarine thruster systems have been problematic. Notably AC motor controllers and DC brush motor powered thrusters have been the cause of many a company’s downfall. Other problems such as 120VDC battery buss voltages have compounded the overall problem. Since the early tourist submarines first came into use during the mid 80’s, motor controller technology has steadily developed. Certain manufacturers have produced systems which have proven to be more capable and more importantly, reliable than their early counterparts. Unfortunately, this leaves quite a few of the older tourist and research submersibles struggling with the older unreliable systems that are still in use. A little known fact is that motor drive systems have a finite operating life, indeed they have a ‘shelf life’. This is due to the deterioration of the large capacitors used in the drive controllers. This occurs even when the drive is not in use. If a drive is more than five years old, then it’s capacitors are already approaching the end of their useful life. As a result these drives are now becoming tired and often prone to failure. Usually with accompanying pyrotechnics! Silvercrest can offer a new ‘replacement’ propulsion system for both new build and existing manned submarines. We tailor the installation to solve your propulsion requirements. Once the problems have been identified and assessed, where needed, we will re-design your battery buss arrangement to produce a working voltage suitable to run a reliable and powerful thruster system. We will then design the motors specifically to meet your requirements. The pressure compensation system is added and the final stage of the design process is matching the correct drive with your new motors.

Recently Silvercrest completed the installation of our 69kW (6 x 11.5kW) AC propulsion and ballast system into one of the Odyssey class tourist submarines in south-east Asia. The system utilizes a state of the art, purpose built, 11.5kW thruster / ballast pump motor. A custom built submersible, 3 phase, AC, squirrel cage induction motor encased in a 316 Stainless Steel compensated housing. The motor was designed specifically to match the available buss voltage and it’s dedicated motor invertor controller. The Silvercrest motor is smooth, quiet and powerful. Motor control is supplied through a CT Commander SE invertor controller drive. Manufactured by one of the leading drive manufacturers in the world today. Each drive utilizes digital control using an onboard processor with EEPROM data storage. This allows the drive to store operating parameters and its own operating history for maintenance and fault diagnosis purposes. A twin Burgmann tandem mechanical shaft seal arrangement, fitted on each motor shaft, provides protection from water ingress. This works in conjunction with a custom built 33 Lt capacity oil-filled central motor compensation system.

Great attention has been applied to designing our motor systems for reliability and a long working life. All components are rated to at least 150% of required working capacity. This over rating of individual components ensures that no single part of the system can ever be overloaded during correct use. Specific motor functions and operational profiles can be catered for and programmed into the CT controller. For example the Odyssey system has a ‘Turbo’ function, whereby the motors run normally with a 7.5kW max output. Then at the flick of a switch on the pilot’s console, the motor can be enabled to output it’s maximum 11.5kW (for 1½ minutes) for use in maneuvering emergencies.

Motors of various ratings are available from Silvercrest/SME, utilizing many of the same frame parts. For example our 15kW motor utilizes the exact same parts as the 11.5kW unit, but with more motor laminations and therefore a slightly longer body. This reduces your spares requirement even when mixing and matching the motor sizes. Military spec versions of the motors are also available on request.

Small Thrusters built for a manned submersible.

Silvercrest / SME delivered in twelve weeks from placement of order, a complete new thruster system for a dry-transfer submarine.

SME 10kW / 160VAC (inverter controlled - 240VDC supplied) thruster.

OVERVIEW.

The new propulsion system is 240VDC based, using a 6-pole motor with its invertor drive programmed for maximum frequency output of 40-45 Hz. Using a directly driven motor to propeller configuration, this relates to a top speed of 900RPM. The thruster nozzle and propeller were designed for optimum performance at this speed, with as linear a performance profile as possible.

In order to improve the reliability of the system and to reduce motor, invertor and associated cabling sizes, the battery buss voltage from each battery pod was connected in series via a new purpose built 240VDC distribution panel. As the supply to the inverters was derived from a battery, the issue of supply frequency was not a concern. Therefore we opted for 50Hz inverter units as these are more ‘standard’ and therefore more readily available and cheaper. Silvercrest/SME controller specialists carried out the initial invertor installation and commissioning of the motors and controllers. During installation the motor controller sets were ‘dynamometer’ tuned using an in-built optimization facility. The controllers can then be either generically programmed for use in any location or individually in-situ programmed to provide optimum operating performance for each given motor operating position. For motor speed control signals into the inverter, the simplest option, from a fault finding and maintenance point of view, was to provide an analog voltage signal (+10VDC to -10VDC). This option required a small interface bi-directional interface PCB that was mounted directly on the face of the controller. We have used this option on other manned submarine applications with excellent results. The propellers and nozzles were custom designed for each application, using computer 3D modeling to analyze the CFD of our designs to visualize and adjust operating profiles. As a result we are able to design for optimum performance and efficiency.

Power drive to load using an output shaft with a standard coupling, or close coupled.

Single drive shaft, or a drive shaft at both ends, (double shaft extension).

SUBMERSIBLE MOTOR ENGINEERING can design and build a motor with a completely new lamination to meet special design requirements, if necessary.

SUBMERSIBLE MOTOR ENGINEERING design their motors so they do not run hot. Typical motors can run on deck for at least 10 minutes on full load, with no cooling, without overheating. The motors are designed to be compact in size and suitable for heavy-duty applications, such as subsea trenching.

If weight is important, SUBMERSIBLE MOTOR ENGINEERING can design the motor for minimum weight by utilising an aluminium construction and a hollow motor shaft, etc., while still ensuring the motor is generously rated for full load operation. If the motor is going to drive a hydraulic pump we recommend a close-coupled arrangement to save the weight of the coupling and the coupling housing.

SUBMERSIBLE MOTOR ENGINEERING can design and build motors for all voltages to 6600 Volts with 50Hz or 60Hz frequencies, or for VVVF requirements. High Voltage motors can have random stator windings, or formed coils, depending on space and weight constraints. The winding wire for the High Voltage motors is double insulated and passes a twisted wire test at 16,000 volts and is rated up to 155 Deg.C. All windings are designed to keep 'turn to turn' voltage to a minimum. All winding materials and cables, are specially selected to be suitable for use in hydraulic oil.

In general the SUBMERSIBLE MOTOR ENGINEERING subsea submersible motors have low loss lamination steel (3 Watts/kg), which allows for higher flux densities, and less heat, with less material and weight.

All motors can be oil filled and we recommend hydraulic oils for good lubrication characteristics, in preference to electrical oil that has better di-electric capabilities, but worse lubrication capabilities.

If motors are going to drive a water pump Silvercrest/SUBMERSIBLE MOTOR ENGINEERING can design the motor to take the thrust load from the pump, and keep the sea water out of the motor with a single or double mechanical seal arrangement.

Thruster motors can be designed and built for voltage/speed control, which is a relatively simple speed control system, and they can also be built with a thrust bearing incorporated to take the thrust load from the impeller.

To ensure the integrity of the motor housing SUBMERSIBLE MOTOR ENGINEERING does not use castings. All components are machined from solid or from extrusions. The external aluminium components are typically 6061 T6 marine grade aluminium and hard anodised to a military specification.

All ball bearings are from well-known brands such as SKF, FAG, or NSK. Oil seals are high temperature and typically made from Viton. Mechanical seals are typically Burgmann.

All hardware used on SUBMERSIBLE MOTOR ENGINEERING SUBSEA motors is 316SS.

All fixing holes are blind except the "oil in" and "oil out" fittings and the stator pack fixing bolt, if applicable.

The preferred power cable entry system for SUBMERSIBLE MOTOR ENGINEERING motors is to use an "oily tube" connected to an adaptor that is part of an oil tight rubber gland that is fixed to the stator frame. We do not recommend bringing the power cables through the end shields of the motor because this creates additional complications when the motors are stripped down during service, because the end shields cannot be readily removed from the stator. Subsea connectors can be offered as an alternative to the Oily Tube if requested.

SUBMERSIBLE MOTOR ENGINEERING strongly recommend that the motors are supplied with PT100s fitted in the windings and also in the bearings and that the internal motor temperature. SME can also offer additional protection with a water detector. The auxiliary connections for PT100s, can be made through standard high pressure, water tight, plug and sockets as supplied by "Subconn", "Impulse", and "Burton". These are also fitted to a connection block on the stator, not on the end shield.

All finished motors are pressure tested to ensure they are "oil tight" and suitable for compensated operation down to 4000 metres.

All motors are rated for continuous operation, and all prototype motors are full load performance tested at rated voltage and rated frequency, to confirm their performance characteristics. All motors can be issued with a "Type Test Certificate" or even full load tested at additional cost, if required.

SUBMERSIBLE MOTOR ENGINEERING can arrange for hydraulic pumps to be set up and tested on the motors at rated voltage and frequency.

SUBMERSIBLE MOTOR ENGINEERING can supply Hydraulic Power Units complete with the addition of a customer specified Hydraulic Pump.

SUBMERSIBLE MOTOR ENGINEERING is a fully quality assured company to ISO 9001.2000 for "Design, development, manufacture, and testing of submersible electric motors and electric motors for remotely operated vehicles".

SUBMERSIBLE MOTOR ENGINEERING Subsea motors can be designed and built for all subsea applications, ROVs, Trenchers, Ploughs, Submarines, and Dredges.

All makes of subsea motor can be serviced, repaired and tested by SME. In some cases the original motors can be significantly upgraded. If you are having problems with your existing subsea motors please contact SUBMERSIBLE MOTOR ENGINEERING - we are keen to help, and we are very price competitive.

At SUBMERSIBLE MOTOR ENGINEERING we are continually working on improving the performance of our products and for this reason we reserve the right to make changes without notice to any of the data in this brochure.

Please contact us direct for confirmation of any drawing dimensions or performance data.

ELECTRIC MOTORS FOR SUBSEA MINING.

Submersible Motor Engineering are a leading supplier of Electric Motors for subsea applications such as ROVs, TMS units, HPUs, Subsea Trenching machines, and Subsea Ploughs.

SUBMERSIBLE MOTOR ENGINEERING was recently awarded a contract to design and build a set of electric motors for a Subsea Mining project which is understood to be the first deep water Subsea mining project in the world. The motors will have to operate at up to 2,000 metres depth, and will be subject to continuous heavy vibration of up to 10 mm/s and shock loading up to 10G. Due to the depth and the high power requirements it was decided the machines had to operate at 6600 volts to reduce the current in the long umbilical power supply cable.

SUBMERSIBLE MOTOR ENGINEERING commonly produce motors to operate at 3000, 3300, and 4160 volts, but 6600 volts posed some new challenges as we needed to design and build the motors with hot pressed formed coil stator windings. The shock and vibration requirements also required the selection of a very heavy duty bearing arrangement, which was reviewed by SKF to ensure the final design was more than capable of handling the required duty.

There are three different mining machines, and they require five different types of motors which drive the cutter heads, slurry pumps, and hydraulic power units, (HPUs). The cutter head motors are rated at 300kW and 600kW, 4 Pole. The slurry pumps at 330kW, 6 Pole, and 650kW 12 Pole. The HPU motors at 400kW 4 Pole. The motors were all full load dynamometer tested by SUBMERSIBLE MOTOR ENGINEERING. All of the motors except the HPU motors will operate with Variable Frequency Drives and these motors were dynamometer tested with the drives. All of this testing was undertaken with the customer at SUBMERSIBLE MOTOR ENGINEERING’s Maddington factory. All the motors have all been delivered to the customer.

18 inch AND 22 inch Motors.

SUBMERSIBLE MOTOR ENGINEERING now produce 18 inch and 22 inch motors with 2 or 4 pole speeds. These motors are water filled and available with 2300, 3300, 4160, or 6600 volt windings. The thrust bearings are continuously rated at 7,700 kg (17,000 lbs).

SUBMERSIBLE MOTOR ENGINEERING recently supplied two motors rated at 625Hp, 4160 volts, 4 pole, which have a continuous thrust load of about 7,000 kg and a closed valve thrust load of about 10,000 kg. Prior to installation these motors and pumps were independently tested by S&N Pumps in Houston.

These motors can be supplied in 316 Stainless Steel or Duplex Stainless Steel. As with all the SUBMERSIBLE MOTOR ENGINEERING product range, these motors are also available with SUBMERSIBLE MOTOR ENGINEERING’s Heat Exchanger cooling system to ensure the motors are suitable for the most demanding applications.

SUBMERSIBLE MOTOR ENGINEERING have been producing their range WD “sump pump” motors for many years to cover a broad range of submerged pumping applications. The WD range from SUBMERSIBLE MOTOR ENGINEERING offers a motor that is suitable for an extremely broad range of uses. The mechanical interface can be designed to match many different types of pumps. These motors has been designed to operate as a wet motor, either in a sump or mounted in a manifold, or as a dry motor with a water jacket feed from the pumped liquid.

A recent customer had an existing pumping station on a river bank in Queensland. He needed a motor that could be fitted to the existing pumps. The original pumps were flooded regularly which caused the air cooled motors to fail. The new motors were required to operate in a dry environment most of the time, but to also be able to operate during the regular floods that occurred at the site. SUBMERSIBLE MOTOR ENGINEERING provided three 150kW, 4 Pole, WD motors fitted with a water jacket to allow long term reliability in an ambient that regularly reaches in excess of 40 Deg C. The Water Jacket was fed by a small bleed from the Pump Discharge. These motors were installed on the pumps and were operating well despite being flooded several times in their first few months of operation. WD Motors are a very flexible product and SUBMERSIBLE MOTOR ENGINEERING can engineer these motors to solve many complex applications.

HIGH VOLTAGE SUBMERSIBLE MOTOR REPAIRS.

SUBMERSIBLE MOTOR ENGINEERING design and manufacture large High Voltage Submersible Motors so we are quite capable of servicing and maintaining other brands of submersible motors. SUBMERSIBLE MOTOR ENGINEERING has repaired numerous Pleuger, Weir, Haywood Tyler, and Byron Jackson, high voltage sea water lift pump motors for some of the premier oil companies around the world.

SUBMERSIBLE MOTOR ENGINEERING is the service supplier of choice for Oil and Gas, Mining, and the Municipal Water Supply Industries, especially in Australia, New Zealand, and South East Asia. In most cases SUBMERSIBLE MOTOR ENGINEERING can offer and deliver a much quicker and cost effective repair than the original OEM.

SUBMERSIBLE MOTOR ENGINEERING can also provide full load pump testing to ensure the repaired motor will be reliable before it is re-installed.

SUBMERSIBLE MOTOR ENGINEERING can also offer on-site inspection, provision of on-site spares, training of staff about maintenance and maintenance issues, and commissioning staff during installations.

SUBMERSIBLE MOTOR ENGINEERING should be the first choice for the provision of Maintenance and Service of Submersible Electric Motors.

DYNAMOMETER LOAD TESTING.

SUBMERSIBLE MOTOR ENGINEERING have increased their load testing capacity in Maddington with the acquisition of a new 2,500kW “water brake” dynamometer and additional high voltage transformers, switchgear, and instrumentation. SUBMERSIBLE MOTOR ENGINEERING can now provide a broad range of no load and full load testing at 50 or 60 Hz, and typical voltages of 2300, 3000, 3300, 4160, and 6600 volts. The extensive range of transformers and voltage regulators as well as multiple dynamometers means SUBMERSIBLE MOTOR ENGINEERING can ensure that new, and repaired, motors, are tested to ensure they meet any applicable requirements and specifications.

SUBMERSIBLE MOTOR ENGINEERING NEW OFFICE.

SME have recently moved into bigger and better premises in Phoenix, Arizona. The new factory has 17,500 sq ft (1,622 m2) of space and has been set up to offer customers the repair and rewinding of submersible motors. There is a fully equipped machine shop, winding shop, and testing facility. The new building has a 600 amp power supply, so they can run large motors on no load.

SUBMERSIBLE MOTOR ENGINEERING carry a large stock of new submersible motors and plan to increase this in the near future.

PERMANENT MAGNET GENERATORS FOR TIDAL GENERATION.

SUBMERSIBLE MOTOR ENGINEERING recently built a prototype subsea generator that was rated at 100kW, 40 Poles, (18 RPM), and 500 Volts. The generator is air filled as it is not expected to operate below 20 metres of depth, and weighed 4.5 tonnes fully assembled.

The generator was full load tested, which was quite complicated to organize, as we needed a 1.5 MW variable speed motor/drive and a 10:1 ratio gearbox that could handle the full load torque of approximately 60,000 Nm. The performance matched the design quite closely, with an efficiency of 86%, and a PF of 0.99. This generator was designed for very low speed operation to negate the need for a gearbox, however, SUBMERSIBLE MOTOR ENGINEERING now believe it is probably better to design the generator for a higher speed with a single stage gearbox.

Submersible Motor Engineering Hydraulic Power Units (HPU) are used throughout the subsea oil and gas industry, for subsea hydraulic power generation, and for running high pressure/high flow water pumps.

Submersible Subsea Motors.

SME design and manufacture a world leading range of Subsea Electric Motors, including motors for HPU's on ROV's, Electric Thrusters for Manned Submarines, and Heavy Duty Jetting Pumps on Subsea Trenchers.

SME motors are robust and reliable in the toughest of environments. Our flexible design capabilities mean we can manufacture Subsea Motors to suit any application. Our range of motors allow Flexible External Dimensions to suit all requirements and provide the possibility of "Drop In" replacement motors.

SME have produced over 100 different types of Subsea motors and thousands of motors.

We offer a variety of Construction Materials from Anodised Aluminium to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of light weight design.

To ensure the integrity of the motors SME does not use castings, and all components are manufactured from solid metal or extrusions.

Motors can be offered with a variety of Interfaces for Driven Equipment from Robust Shafts with Multiple Shaft Seals, to Close Coupled Motors with Female Spline Hubs to allow direct fitment of Hydraulic Pumps.

SME can design and manufacture from the "Lamination Up" to ensure the Motor is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements.

SME can build motors from Fractional Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Subsea Motors can be manufactured in all voltages through to 6600V at 50Hz or 60Hz, or for use with variable Speed Drives.

Due to SME's proprietary Insulation System motors up to 4160V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability.

This insulation system is specifically engineered to ensure suitability of operation in Hydraulic Oil or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All motors are designed for external compensation allowing for operation at depths as much as 4000M.

The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load.

SME Motors are fitted with Water Detection Probes and Temperature Detectors and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME's extensive testing facilities ensure we can test these Subsea Motors at rated Voltage and Frequency. This testing can also involve Hydraulic Load testing on a HPU or Flow and Pressure Testing of Jetting Pump in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering's extensive Service Capability also ensures we are best location for Service and Refurbishment of Subsea Motors of any manufacturer. Quite often SME can return motors to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

Repair and rewind of large high voltage (500kW 6600V) submersible electric motors.

SME High Temperature Submersibles in 6"to 20" frames suitable for operation in ambients of 75 Deg.C

Subsea Generators can be air filled for optimum efficiency and are suitable for depths down to 30m.

Induction Generators can be supplied for 2P, 4P, 6P, 8P, and 10P operation usually close coupled to a gear box. (The efficiency and PF are poor for Induction Generators with more than 10 Poles).

Permanent Magnet Synchronous Generators can be supplied with very low speeds and 40 poles or 60 poles for nominal 20 RPM operation, which negates the need for a gearbox. These generators can have high efficiency up to 95% and they have unity Power Factor. Because of the number of poles these generators tend to be quite large in Diameter - typically more than one metre.

If Subsea Generators are to be used at depths below 30 metres it is recommended that they are oil filled and compensated - but the mechanical losses will be about 3% due to the extra friction from the oil.

75hp ROV Electric motor ready for shipping.

200hp Submersible Electric ROV motor under construction.

Subsea Submersible Motors.

SME design and manufacture a world leading range of Subsea Electric Motors, Submersible Electric Motors, and ROV Electric Motors. For HPU's on ROV's, Electric Thrusters for Manned Submarines, and Heavy Duty Jetting Pumps on Subsea Trenchers. SME motors are robust and reliable in the toughest of environments.

SME have produced over 100 different types of Subsea, Submersible and ROV motor.

We have manufactured thousands of motors, which have been supplied worldwide to our onshore and offshore customers.

We offer a variety of Construction Materials from Anodised Aluminium, to exotic Stainless Steel Alloys. To ensure long term reliability in varied environments, whilst still offering the advantages of light weight design. To ensure the integrity of the motors SME does not use castings, and all components are manufactured from solid metal or extrusions.

Our motors can be offered with a variety of Interfaces for Driven Equipment - from Robust Shafts with Multiple Shaft Seals, to Close Coupled Motors with Female Spline Hubs, to allow direct fitment of Hydraulic Pumps.

SME can design and manufacture from the "Lamination Up" to ensure the motor is ideally suited for your exact application. This bespoke manufacturing policy ensures we can meet any special design requirements that you may have. SME can build motors from Fractional Kilowatt Motors, right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Subsea Motors can be manufactured in all voltages from 24V through to 6600V, at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME's proprietary Insulation System, motors up to 4160V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability. This insulation system is specifically engineered to ensure suitability of operation in Hydraulic Oil, or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All motors are designed for external compensation allowing for operation at subsea depths to 4000M. The Motors can also be offered with cooling circuits, to ensure high output motors maintain minimal operating temperatures at Full Load.

SME Motors are fitted with Water Detection Probes and Temperature Detectors, and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME's extensive testing facilities ensure we can test these Subsea Motors at rated Voltage and Frequency.

This testing can also involve Hydraulic Load testing on a HPU, or Flow and Pressure Testing of Jetting Pumps in our test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering's extensive Service Capability also ensures we are best location for Service and refurbishment of Subsea Motors of any other manufacturer. Quite often SME can return motors to their clients in a better than new condition, due to our ability to implement the latest Engineering Practices into the repair process.

SME PROFILE.

Submersible Motor Engineering is an Australian Company that designs and manufactures Submersible and Subsea Electric Motors for the Global Market.

SME has the ability to design and produce specialist electric motors for complex applications, in many cases for a "one off' requirement.

SME should be the company of choice for you to work with. To provide high quality Engineered Solutions for your Submersible and Subsea Electric Motor requirements.

SME offers a Repair, Rewind, Modification, and Technical Support Service in Perth, and in Phoenix. Our facilities ensure that we can handle any job we are confronted with, regardless of complexity.

When it comes to Sales and Service of Submersible and Subsea Motors, SME's extensive range of worldwide locations ensures that we can provide Excellent Service and Technical Support on our own SME range of products, but also the products from all other manufacturers of Submersible Motors and Subsea Motors.

SME has extensive service, repair, maintenance and testing capabilities, at our purpose built facilities in Western Australia and Arizona. SME can provide solutions for any submersible or subsea electric motor applications– from design and speciﬁcation through to servicing, repair and/or replacement. Our experience and commitment to quality allows our clients complete conﬁdence that their requirements are in the best possible hands. Submersible Motor Engineering Pty Ltd is an Australian Company that designs and manufactures Submersible and Subsea Electric Motors for a Global Market. SME has the ability to design and produce specialist electric motors for complex applications, in many cases for a “one off” requirement. SME is the company of choice to work with, to provide High Quality Engineered Solutions for your Submersible and Subsea Motor requirements.

SME offers a Repair, rewind, Modification and Technical Support Service in Perth and in Phoenix. Our facilities ensure that we can handle any job we are confronted with, regardless of complexity. Our purpose built testing facility ensures absolute confidence in workmanship and reliability for our clients.

When it comes to Sales and Service of Submersible and Subsea Motors, SME’s extensive range of Worldwide Locations ensures that we can provide Excellent Service and Technical Support on our own SME range of products, but also the products from all other manufacturers of Submersible Motors or Subsea Motors

SME design and manufacture a world leading range of Subsea Electric Motors, including motors for HPU’s on ROV‘s, Electric Thrusters for Manned Submarines, and Heavy Duty Jetting Pumps on Subsea Trenchers. SME motors are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Subsea Motors to suit any application. Our range of motors allow Flexible External Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement motors. SME have produced over l00 different types of Subsea motors and thousands of motors.

We offer a variety of Construction Materials from Anodised Aluminium to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of light weight design. To ensure the integrity of the motors SME does not use castings and all components are manufactured from solid metal or extrusions.

Motors can be offered with a variety of Interfaces for Driven Equipment — from Robust Shafts with Multiple Shaft Seals to Close Coupled Motors with Female Spline Hubs to allow direct ﬁtment of Hydraulic Pumps.

SME can design and manufacture from the “Lamination Up” to ensure the Motor is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motors from Fractional Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Subsea Motors can be manufactured in all voltages through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME’s proprietary Insulation System motors up to 4l60V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability. This insulation system is speciﬁcally engineered to ensure suitability of operation in Hydraulic Oil or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All motors are designed for external compensation allowing for operation at depths as much as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load. SME Motors are ﬁtted with Water Detection Probes and Temperature Detectors and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME’s extensive testing facilities ensure we can test these Subsea Motors at rated Voltage and Frequency. This testing can also involve Hydraulic Load testing on a HPU or Flow and Pressure Testing of Jetting Pumps in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are the best location for Service and Refurbishment of Subsea Motors of any manufacturer. Quite often SME can return motors to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

SME SPECIFICATION FOR SUBMERSIBLE MOTORS.

Standard Water Filled

Submersible, water tight, and water ﬁlled, with double insulated wire and capable of continuous operation at nameplate power under water in a maximum water temperature of 35 Deg.C. without de-rating, and suitable for “Direct on Line” starting. Six lead motors for “Star/Delta” starting are available as an option.

Heat Exchanger Water Filled

Submersible, water tight, and water ﬁlled, with double insulated wire and capable of continuous operation at nameplate power under water in a maximum water temperature of 55 Deg.C. without de-rating, and suitable for “Direct on Line” starting. Six lead motors for “Star/Delta” starting are available as an option. This motor is recommended for high ambient water temperatures and for extended motor life due to the reduced winding temperatures.

SUBSEA PUMPS.

SME design and manufacture a world leading range of Electric and Hydraulically Driven Subsea Pumps. These are designed to operate as Heavy Duty Jetting Pumps on Subsea Trenchers and Ploughs, Subsea Dredging and Excavation Equipment. SME Pumps are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Subsea Pumps to suit most applications. Our range of motors allow Flexible External Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement units.

We offer a variety of Construction Materials from Anodised Aluminium to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of light weight design.

SME can design and manufacture from “raw material up” to ensure the Motor and Pump is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motor and pumps from Fractional Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Electrically Driven Subsea Pumps can be manufactured in all voltages from 24V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to

SME’s proprietary Insulation System motors up to 4160V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability. This insulation system is speciﬁcally engineered to ensure suitability of operation in Hydraulic Oil or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All pumps are designed for external compensation allowing for operation at depths as much as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load. SME Motors are ﬁtted with Water Detection Probes and Temperature Detectors and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME’s extensive testing facilities ensure we can test these Subsea Pumps at rated Voltage and Frequency. This testing includes involve Hydraulic Performance/Reliability testing on a HPU or Job Specific Electrical Supply at rated Voltage and Frequency in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are best location for Service and Refurbishment of Subsea Motors and Pumps of any manufacturer. Quite often SME can return motors and pumps to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

SME – WD Series Motors – for Open Well or Sump Applications Submerged or not Submerged, Cast Iron, Steel, or Stainless Steel Construction.

SME has many years experience in the manufacture of submersible motors and the WD series of motors have been designed for the toughest jobs to ensure reliability and a long service life. When conditions are extreme and performance is critical these motors deliver the quality and durability required.

WD motors are designed for continuous operation in sludge, effluent, slurry, and other liquids – to a submergence of 10 metres, in an open well, a river bank, a tailings pond, or a sump. The motors are air filled, with a separate oil ﬁlled seal chamber to ensure robust sealing of the drive shaft. The WD Series motors can also be supplied with a large range of sealing options to ensure the motor is suitable for the most extreme conditions from a combination of lip seals, and/or mechanical seals, to complex cartridge seal arrangements.

If the motors are going to be continuously submerged they will rely on the liquid they are submerged in for cooling. If they are not going to be submerged continuously – or only intermittently — they are designed with a water jacket for cooling and water is usually bled from the pump through the water jacket.

These IP68 motors have been used in both vertical and horizontal applications driving a diverse range of pumps in many unique applications. The Motors can be supplied with an extensive array of ﬂange and shaft dimensions to ensure the motors can be matched to a large range of different pumps. The motors can also be supplied with standard IEC and NEMA ﬂange and shaft dimensions.

The motors are very robust and designed to take the physical abuse on a typical mine site. They can tolerate overloads, and a lack of cooling. They can maintain full load operation for 15 minutes with no external cooling. These motors offer a robust alternative to other units that suffer from shorter operating lives – with no changes to the existing Wet end performance.

These motors are ﬁtted with moisture detection probes and PT100, or themiistor, thermal protection — as standard – and provided these are properly connected and set to give advance warning of problems these motors will give many years of reliable service in extreme applications.

Service And Repair Of Submersible Electric Motors.

SME has extensive service, repair, maintenance and testing capabilities, at our purpose built facilities in Western Australia and Arizona. SME can provide a solution for submersible electric motors – from design and speciﬁcation through to servicing, repair and/or replacement Our experience and commitment to quality allows our clients complete conﬁdence that their requirements are in the best possible hands.

SME specialises in minimizing downtime for critical application submersible electric motors by providing an efﬁcient and cost effective mechanical repair and rewinding service at our ISO 9001 accredited facilities. Our experienced technicians are proficient at working with all brands of submersible electric motors and can quickly return motors back to service. We also maintain detailed records of motor failures across all brands which assist with plant management. SME is well qualiﬁed to offer advice to prevent future faults.

Motor Modification

SME can modify and upgrade all brands of submersible electric motors during the repair and servicing process to meet the requirements of any application. These modifications can include changing materials, adding temperature sensors, re-design to suit different voltages and frequencies, applying protective coatings, offering extended cable lengths and splicing cables, replacing damaged, corroded, or worn parts and other application specific alterations. SME has the “in house” machining and fabrication capabilities to manufacture obsolete parts ensuring maximum life for motors are achieved.

In-Field Support

SME can provide a number of site support services to ensure the reliability and performance of our clients‘ submersible motors. Our experienced ﬁeld service engineers can provide installation, commissioning, fault finding supervision, and training.

Testing

SME‘s West Australian facility, located in Perth, provides for an extensive testing regime for repaired and overhauled motors. SME can full load test motors on our dynamometers and can also offer performance testing of complete pump/motor units in our purpose built test tank – at the speciﬁed voltage and frequency up to 6600 volts.

SME can guarantee motors that have been serviced and repaired are ﬁt for purpose before dispatch, providing customers with complete confidence in the work prior to re-installation. All motors that are rewound by SME are subject to an immersion pressure test which is conducted in our pressure test vessel to ensure the integrity of the windings prior to assembly and load testing. Our commitment to a strict testing regime protects our clients from the risks of downtime caused by unexpected failure.

Submersible Motor Engineering design, manufacture, and supply, Submersible Electric Motors for Deep Well Pumps, Subsea Electric Motors and Submersible Electric Motors for Sump pumps, and any special purpose submersible electric motor requirements. SME also offer Subsea Electric Generators for Tidal and River Power Generation. SME has extensive service, repair, maintenance and testing capabilities, at our purpose built facilities in Western Australia and Arizona. SME can provide solutions for any submersible or subsea electric motor applications– from design and speciﬁcation through to servicing, repair and/or replacement. Our experience and commitment to quality allows our clients complete conﬁdence that their requirements are in the best possible hands.

Subsea Electric Motors & ROV Electric Motors.

SME design and manufacture a world leading range of Subsea Electric Motors, including motors for HPU’s on ROV‘s, Electric Thrusters for Manned Submarines, and Heavy Duty Jetting Pumps on Subsea Trenchers. SME motors are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Subsea Motors to suit any application. Our range of motors allow Flexible External Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement motors. SME have produced over l00 different types of Subsea motors and thousands of motors.

We offer a variety of Construction Materials from Anodised Aluminium to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of light weight design. To ensure the integrity of the motors SME does not use castings and all components are manufactured from solid metal or extrusions.

Motors can be offered with a variety of Interfaces for Driven Equipment — from Robust Shafts with Multiple Shaft Seals to Close Coupled Motors with Female Spline Hubs to allow direct ﬁtment of Hydraulic Pumps.

SME can design and manufacture from the “Lamination Up” to ensure the Motor is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motors from Fractional Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Subsea Motors can be manufactured in all voltages from 24V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME’s proprietary Insulation System motors up to 4l60V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability. This insulation system is speciﬁcally engineered to ensure suitability of operation in Hydraulic Oil or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All motors are designed for external compensation allowing for operation at depths as deep as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load. SME Motors are ﬁtted with Water Detection Probes and Temperature Detectors and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME’s extensive testing facilities ensure we can test these Subsea Motors at rated Voltage and Frequency. This testing can also involve Hydraulic Load testing on a HPU, or Flow and Pressure Testing of Jetting Pumps in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are the best location for Service and Refurbishment of Subsea Motors of any manufacturer. Quite often SME can return motors to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

Service And Repair Of Submersible Electric Motors

A new service, repair, maintenance and testing facility is being opened in England (UK).

SME has extensive service, repair, maintenance and testing capabilities, at our purpose built facilities in Western Australia and Arizona. SME can provide a solution for submersible electric motors – from design and speciﬁcation through to servicing, repair and/or replacement. Our experience and commitment to quality allows our clients complete conﬁdence that their requirements are in the best possible hands.

SME specialises in minimizing downtime for critical application submersible electric motors by providing an efﬁcient and cost effective mechanical repair and rewinding service at our ISO 9001 accredited facilities. Our experienced technicians are proficient at working with all brands of submersible electric motors and can quickly return motors back to service. We also maintain detailed records of motor failures across all brands which assist with plant management. SME is well qualiﬁed to offer advice to prevent future faults.

Motor Modification

SME can modify and upgrade all brands of submersible electric motors during the repair and servicing process to meet the requirements of any application. These modifications can include changing materials, adding temperature sensors, re-design to suit different voltages and frequencies, applying protective coatings, offering extended cable lengths and splicing cables, replacing damaged, corroded, or worn parts and other application specific alterations. SME has the “in house” machining and fabrication capabilities to manufacture obsolete parts ensuring maximum life for motors are achieved.

In-Field Support

SME can provide a number of site support services to ensure the reliability and performance of our clients‘ submersible motors. Our experienced ﬁeld service engineers can provide installation, commissioning, fault finding supervision, and training.

Testing

SME‘s factory facility, located in Perth, provides for an extensive testing regime for repaired and overhauled motors. SME can full load test motors on our dynamometers and can also offer performance testing of complete pump/motor units in our purpose built test tank – at the speciﬁed voltage and frequency up to 6600 volts.

SME can guarantee motors that have been serviced and repaired are fully tested before dispatch, providing customers with complete confidence in the work prior to re-installation. All motors that are rewound by SME are subject to an immersion pressure test which is conducted in our pressure test vessel to ensure the integrity of the windings prior to assembly and load testing. Our commitment to a strict testing regime protects our clients from the risks of downtime caused by unexpected failure.

SME design and manufacture a broad range of Submersible Electric Motors, including motors for variety of applications from Mine De-watering to Sea Water Lift Pumps. SME motors are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Submersible Motors to suit most applications. Our range of motors include Flexible Interface Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement motors.

We offer a variety of Construction Materials from Cast Iron, SS316 Grade Stainless Steels as Standard to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of excellent performance.

Motors can be offered with a variety of Interfaces for a broad range of Pump types — from Standard NEMA and IEC frames to unique Flange and shaft arrangements with Multiple Shaft Seals.

SME can design and manufacture from the “Lamination Up” to ensure the Motor is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motors from small Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Submersible Motors can be manufactured in all voltages from 110V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME’s flexible manufacturing systems we can offer motors in water or oil filled constructions. Motors can be provided for internally balanced or header tank installations.

SME’s extensive testing facilities ensure we can test these Submersible Motors at rated Voltage and Frequency. This testing can also involve Hydraulic Performance testing on a customers pump in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are the best location for Service and Refurbishment of Submersible Motors of any manufacturer. Quite often SME can return motors to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

SME – WD Series Motors.

For Open Well or Sump Applications Submerged or not Submerged, With Cast Iron, Steel, or Stainless Steel Construction.

SME has many years experience in the manufacture of submersible motors and the WD series of motors have been designed for the toughest jobs to ensure reliability and a long service life. When conditions are extreme and performance is critical these motors deliver the quality and durability required.

WD motors are designed for continuous operation in sludge, effluent, slurry, and other liquids – to a submergence of 10 metres, in an open well, a river bank, a tailings pond, or a sump. The motors are air filled, with a separate oil ﬁlled seal chamber to ensure robust sealing of the drive shaft. The WD Series motors can also be supplied with a large range of sealing options to ensure the motor is suitable for the most extreme conditions from a combination of lip seals, and/or mechanical seals, to complex cartridge seal arrangements.

If the motors are going to be continuously submerged they will rely on the liquid they are submerged in for cooling. If they are not going to be submerged continuously – or only intermittently — they are designed with a water jacket for cooling and water is usually bled from the pump through the water jacket.

These IP68 motors have been used in both vertical and horizontal applications driving a diverse range of pumps in many unique applications. The Motors can be supplied with an extensive array of ﬂange and shaft dimensions to ensure the motors can be matched to a large range of different pumps. The motors can also be supplied with standard IEC and NEMA ﬂange and shaft dimensions.

The motors are very robust and designed to take the physical abuse on a typical mine site. They can tolerate overloads, and a lack of cooling. They can maintain full load operation for 15 minutes with no external cooling. These motors offer a robust alternative to other units that suffer from shorter operating lives – with no changes to the existing Wet end performance.

These motors are ﬁtted with moisture detection probes and PT100, or themistor, thermal protection — as standard – and provided these are properly connected and set to give advance warning of problems these motors will give many years of reliable service in extreme applications.

Water Cooled Motors

SME design and manufacture a range of Water Cooled Electric Motors to provide a alternative to Standard Air Cooled Vertical Hollow and Solid Shaft Motors, these motors are for variety of line shaft turbine applications. The removal of the forced air cooling and replacement with a water jacket fed from the discharge of the pump ensures almost silent operation. This makes them uniquely suitable for pumping applications where noise is critical during operation. SME motors are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Water Cooled Motors to suit most applications. Our range of motors include Flexible Interface Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement motors.

We offer a variety of Construction Materials from Cast Iron, SS316 Grade Stainless Steels as Standard to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of excellent performance.

Motors can be offered with a variety of Interfaces for a broad range of Pump types — from Standard NEMA P Base and IEC frames to unique Flange and shaft arrangements.

SME can provide Water Cooled Motors with robustly engineered bearing arrangements to ensure pump thrust loads are absorbed adequately to guarantee long term operation.

SME can design and manufacture from the “Lamination Up” to ensure the Motor is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motors from small Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Submersible Motors can be manufactured in all voltages from 110V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME’s flexible manufacturing systems we can offer motors in water or oil filled constructions. Motors can be provided for internally balanced or header tank installations.

SME’s extensive testing facilities ensure we can test these Water Cooled Motors at rated Voltage and Frequency. This testing can also involve Hydraulic Performance testing on a customers pump in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are the best location for Service and Refurbishment of Water Cooled Motors of any manufacturer. Quite often SME can return motors to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

SUBSEA PUMPS.

SME design and manufacture a world leading range of Electric and Hydraulically Driven Subsea Pumps. These are designed to operate as Heavy Duty Jetting Pumps on Subsea Trenchers and Ploughs, Subsea Dredging and Excavation Equipment. SME Pumps are robust and reliable in the toughest of environments. Our ﬂexible design capabilities mean we can manufacture Subsea Pumps to suit most applications. Our range of motors allow Flexible External Dimensions to suit all requirements and provide the possibility of “Drop In‘’ replacement units.

We offer a variety of Construction Materials from Anodised Aluminium to Exotic Stainless Steel Alloys to ensure long term reliability in varied environments whilst still offering the advantages of light weight design.

SME can design and manufacture from “raw material up” to ensure the Motor and Pump is ideally suited for the application. This bespoke Manufacturing policy ensures we can meet any special design requirements. SME can build motor and pumps from Fractional Kilowatt Motors right through to large outputs in the Megawatts and above to ensure we meet all requirements.

SME Electrically Driven Subsea Pumps can be manufactured in all voltages from 24V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives. Due to SME’s proprietary Insulation System motors up to 4160V can be built with a Random Winding to reduce size and weight whilst losing nothing in terms of reliability. This insulation system is speciﬁcally engineered to ensure suitability of operation in Hydraulic Oil or many of the Bio-Degradable Oils commonly used for Compensation circuits.

All pumps are designed for external compensation allowing for operation at depths as much as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load. SME Motors are ﬁtted with Water Detection Probes and Temperature Detectors and these can be terminated to a variety of different Subsea Connectors. Power can be supplied to the motors through Subsea Connectors or Highly reliable Oily Tube Connections.

SME’s extensive testing facilities ensure we can test these Subsea Pumps at rated Voltage and Frequency. This testing includes involve Hydraulic Performance/Relibility testing on a HPU or Job Specific Electrical Supply at rated Voltage and Frequency in our Test tank. Full string testing involving the Drives, Control Gear, Motor and Driven equipment can also be organised.

Submersible Motor Engineering’s extensive Service Capability also ensures we are best location for Service and Refurbishment of Subsea Motors and Pumps of any manufacturer. Quite often SME can return motors and pumps to their clients in a better than new condition due to our ability to implement the latest Engineering Practices into the repair process.

It is assumed that these motors will be steam cleaned, or chemically cleaned, every day to wash away any contamination.

TEMA Stainless Steel motors are designed and manufactured to operate in extreme conditions with high ambient temperatures, high humidity, water, and steam, etc. These motors are IP67 as standard and can run under water! All the motors are tested under water before they are shipped from the factory to ensure that they are completely air and water tight. The motors have a specially designed assembly arrangement which avoids the use of through bolts or endshield bolts. The outer surfaces of the motors are completely smooth to make it easier to clean and wash away any dirt or food scraps that might collect on them.

The motors can be manufactured in 302, 304, or 316 Stainless Steel. Standard motors are produced in SS304 for a long service life with no corrosion. The shafts are made from SS420 as standard.

The motors can be supplied in TENV (Totally Enclosed Non Ventilated) form with no fan, with fan cowl, or TEFC (Totally Enclosed Fan Cooled) with a fan and stainless fan cowl. The TENV motors are more popular as they are easier to clean. (It is difficult to clean under the fan cowl without removing it).

These motors can be supplied with IE2 (Eff1 or MEPS2) or IE3 Efficiency levels and have been tested to IEC60034.2.1:2007 Method A.

These motors have also been tested and certified by CSA for sale in North America and comply with the requirements for Premium Efficiency. The motors have a low temperature rise. Typically the external temperature for an SSP802-4 0.75kW TENV motor will be less than 60 Deg.C. after one hour on full load, and a TEFC motor will be less than 50 Deg.C.

All motors with a connection box are supplied with 150 Deg.C. thermistors in the windings.

The motors without a connection box do not have thermistors.

All the motors are suitable for use with Invertors, and can be wound with special Inverter duty wire if requested.

The motors are available in standard IEC frames from 63 to 160 in B3, B5, B35, and B14 configurations. The standard B3 foot mount motors can be easily modified to B5 or B14 for coupling to a suitable gearbox. The motors can also be produced to fit special OEM non standard gearboxes such as SEW and Flender.

The standard Foot mount B3 motor can be easily modified to B3/B5 or B3/B14 by adding a separate flange ring. Likewise a B5 motor can be quickly and easily modified to be B14.

The motors are fitted with special NTN Blue Seal bearings, as standard, which are suitable for a very wide range of temperatures with very low friction losses. The drive end is sealed with two modified PTFE oil seals, with a very low friction coefficient, and the shaft is induction hardened to ensure a long service life.

All motors are fitted with one metre of cable, and tested under water as part of the standard routine testing of these motors. Provided that the connection box lid is not removed after the motors are shipped TEMA can guarantee that the motors are completely air and water tight. This means that condensation will not be able to form inside the motors, and that water, or steam, will not be able to enter the motors.

Stainless Steel motors are more expensive than standard cast iron or aluminium frame motors, but we are sure that the TOTAL COST OF OWNERSHIP for these motors is much less than standard motors. Standard motors do not last very long when subjected to steam cleaning or hot water chemical cleaning every day. When the motors fail the cost of the downtime and lost production can often be much more than the extra cost of a Stainless Steel motor.

The expected life of a Stainless Motor is at least 15 years, so these motors should never fail under normal operating conditions, while a standard motor might only last 6 months.

Standard motors are usually painted and it is not uncommon for flakes of paint to break free, when the motor starts to corrode, and contaminate the food being processed. This is another advantage of stainless steel motors. There is no paint to break off.

We offer Subsea Electric Motors. Full Range of Speed Options. All Voltages and Frequencies.

All Construction Options from Anodised Aluminium to Exotic Metal Alloys.

Extensive Electrical and Hydraulic Testing Facility.

Engineered Motor Solutions for Complex Applications .

World Leaders in the Design, Manufacture, and Supply of Subsea electric motors. Over 2000 motors delivered and operating worldwide.

Contact us today: Email. sales@silvercrestsubmarines.co.uk

SME products have been designed and developed utilising many years of operating and service experience with submersible motors and subsea motors.

SME are a quality assured company and are certified to ISO 9001 by SGS for “Design, development, manufacture and testing of submersible subsea electric motors”.

SME produce their motors under a rigorous QA procedure to ensure that all motors are supplied in a “Quality and Reliability Assured” condition. In addition to ensuring the motors are supplied in excellent condition, SME believe it is their responsibility to try to ensure that the end users get many years of reliable life from their SME motors.

At SME we try to help the end user – not just sell them a motor in a box. We offer the services of experienced commissioning engineers to go to site and ensure the motors are installed, commissioned, and protected correctly. We also offer full 24 hour service and testing facilities.

At SME we are continually working to improve the performance of our products and for this reason we reserve the right to make changes without notice to any of the data in this brochure.

Please contact us direct for confirmation of any drawings dimensions or performance data.

SME SUBSEA MOTORS

SME can design and build Subsea motors to suit any requirements, due to our totally flexible design capabilities:

Flexible External Dimensions to suit all applications. Dimensions to allow drop in replacement of existing units. Anodised aluminium, or, 316 stainless steel or more exotic materials, such as Duplex.

Power drive to load using an output shaft with a standard coupling, or, close coupled. Single drive shaft, or, a drive shaft at both ends, double shaft extension.

SME can design and build a motor with a completely new lamination to meet special design requirements, if necessary.

SME design their motors so they do not run hot. Typical motors can run on deck for at least ten minutes on full load, with no cooling, without overheating. The motors are designed to be compact in size and suitable for heavy-duty applications, like trenching.

If weight is important, SME can design the motor for minimum weight by utilising an aluminium construction and a hollow motor shaft, while still ensuring the motor is generously rated for full load operations. If the motor is going to drive a hydraulic pump we recommend a close-coupled arrangement to save the weight of the coupling and the coupling housing.

SME can design and build motors for all voltages from 24 volts to 6600V with 50Hz or 60Hz frequencies, or for VVF requirements. High Voltage motors can have random wound stator windings, or formed coils, depending on space and weight constraints. The winding wire for the High Voltage motors is double insulated and passes a twisted wire test at 16,000 volts and is rated up to 155 Deg.C. All windings are designed to keep ‘turn to turn’ voltage to a minimum. All winding materials and cables are specially selected to be suitable for use in hydraulic oils.

In general, SME Subsea motors have low loss lamination steel (3 watts/kg), which allows for higher flux densities, and less heat, with less materials and weight.

All motors are oil filled and we recommend hydraulic oils for good lubrication characteristics in preference to electrical oil ( which has better di-electric capabilities, but worse lubrication capabilities).

If motors are going to drive a water pump, SME can design the motor to take the thrust load from the pump and keep the sea water out of the motor with a single or double mechanical seal arrangement.

Small thruster motors can be designed and built for voltage/speed control, which is a relatively simple speed control system and can be built with a thrust bearing incorporated to take the thrust load from the impeller.

To ensure the integrity of the motor housing, SME does not use castings. All components are machined from solid or from extrusions. The external aluminium components are typically 6061 T6 marine grade aluminium and hard anodized to a military specification.

All ball bearings are from well known brands such as SKF, FAG, or NSK. Oil seals are high temperature and typically made from Viton. Mechanical seals are typically Burgmann.

All hardware used on SME Subsea motors is 316SS.

All fixing holes are blind. Oil in and out fittings and the stator pack-fixing bolt, if applicable are sealed with O rings.

The preferred power cable entry system for SME motors is to use an “oily tube” connected to an adaptor, which is part of an oil tight rubber gland that is fixed to the stator frame.

SME do not recommend bringing the power cables through the end-shields of the motor as this creates additional complications when the motors are stripped down during service (because the end-shields cannot be readily removed from the stator). Subsea connectors can be offered as an alternative to the Oily Tube if requested.

SME strongly recommend that the motors are fitted with PT100s fitted in the windings and also to the bearings. The internal motor temperatures are monitored and set up to alarm if the temperatures rise above a safe temperature. SME can also offer additional protection with a water detector. The auxiliary connections for PT100s, can be made through standard high pressure, water tight, plug and sockets as, supplied by “Subconn”, “Impulse”, and “Burton”. These are also fitted to a connection block on the stator, not on the end shield.

All finished motors are pressure tested to ensure they are “oil tight” and suitable for compensated operation down to 4000 metres.

All motors are rated for continuous operation and all prototype motors are full load performance tested at rated voltage and rated frequency to confirm their performance characteristics. All motors can be issued with a “Type Test Certificate” or even full load tested at additional cost, if required.

SME can offer to arrange for hydraulic pumps to be set up and tested on the motors at rated voltage and frequency.

SME can offer to supply Hydraulic Power Units, “complete”, with the addition of customer specified Hydraulic Pump.

SME Subsea motors can be designed and built for all subsea applications, such as ROVs, Trenchers, Ploughs, Submarines and Dredges.

All brands of Subsea motor can be serviced, repaired and tested by SME. In some cases the original motors can be significantly upgraded. If you are having problems with your existing Subsea motor please contact SME – we are ready and able to provide assistance and we are very price competitive.

Motors are available in AC Voltages from 24V to 6600V. Motors up to 4160V in Random Wound Designs. Above 4160V motors are manufactured using a Formed Coil system. Special random wound design motors may be available above 4160V for specific applications.

DEPTH RATING

All SME's Subsea Electric Motors are designed for external compensation and have been used at depths of more than 4000M. Compensation advice can be provided on request.

SPEED

Motors are available in a variety of speeds at both 50Hz and 60Hz.

Synchronous speed at different numbers of poles.

(Hz) 2P 4P 6P 8P 10P 12P

50 3000 1500 1000 750 600 500

60 3600 1800 1200 900 720` 600

Lower speed ratings are available on application. Motors are suitable for operation Using variable speed drives and SME can provide advice on variable speed drive operation if requested.

INSTRUMENTATION

SME Subsea Motors are available with a range of instrumentation:

Bearing and Winding Temperature Monitoring

Water Ingress Detection

Pressure Transducer

Resolvers and Encoders

Tachometers

COOLING

Motors are generally designed to operate with no additional cooling other than the ambient water temperatures but in some cases external cooling may be required. SME can provide motors with closed loop cooling circuits or motors that are suitable for use with externally fed cooling circuits.

ELECTRICAL CONNECTIONS

SME Subsea Motors use an oily tube termination for all power connections as standard. However, appropriately sized and rated Subsea connectors can be used as an alternative, either a Bulkhead Connection on the motor, or as part of a fixed Flying Lead Termination.

Instrumentation is generally terminated using a variety of Subsea Connectors. Customers are free to specify their Connectors of choice.

MECHANICAL INTERFACE

Motors are design built to suit the application and SME can supply a broad range of interfaces from direct coupled arrangements to the use of separate coupling housings.

FLANGES: NEMA, IEC, SAE, DIN Standards are all available as well as unique requirements.

Motors can be provided with Double Ended Arrangements to drive multiple loads.

MOTOR MOUNTING

Motors can be provided with various Mounting arrangements including Feet, Flanges, Brackets, or Clamping. In most cases SME can match the mounting interfaces of units being replaced to ensure ease of installation in existing equipment.

Motors can be manufactured for Horizontal or Shaft Up or Down installation.

COMPENSATION REQUIREMENTS

Motors are built to utilise external compensation. Motors are fitted with oil in and out ports as well as several bleed points to facilitate easy plumbing. Fittings can be provided with BSP, NPT or JIC and other fittings with both straight and tapered threads to provided uniformity on the installation.

There are a vast range of acceptable compensation fluids and SME can provide advice in the suitability of various oils.

SME MOTOR RANGE

SME is able to provide many and varied Subsea Motors to suit specific applications. Please contact us to discuss your requirements.

SUBSEA PUMPS

SME design and manufacture a world leading range of Electric and Hydraulically Driven Subsea Pumps. These are designed to operate as Heavy Duty Jetting Pumps on Subsea Trenchers and Ploughs, Subsea Dredging and Excavation Equipment. SME Pumps are robust and reliable in the toughest environments. Our flexible design capabilities mean we can manufacture Subsea Pumps to suit most applications.

SME Electrically Driven Subsea Pumps can be manufactured in all voltages from 380V through to 6600V at 50Hz or 60Hz, or for use with Variable Speed Drives.

All pump motors are designed for external compensation allowing for operation at depths as much as 4000M. The Motors can also be offered with Cooling circuits to ensure high output motors maintain minimal operating temperatures at Full Load.

TESTING

SME‘s West Australian facility, located in Perth, provides for an extensive testing regime for repaired and overhauled motors. SME can full load test motors on our dynamometers and can also offer performance testing of complete pump/motor units in our purpose built test tank – at the specified voltage and frequency up to 6600 volts.

SME can guarantee motors that have been serviced and repaired are fit for purpose before dispatch, providing customers with complete confidence in the work prior to re-installation. All motors that re rewound by SME are subject to an immersion pressure test which is conducted in our pressure test vessel to ensure the integrity of the windings prior to assembly and load testing. Our commitment to a strict testing regime protects our clients from the risks of downtime caused by unexpected failure.

Our Factory offers the following equipment:

High Voltage Transformers 1000/2400/3300/4160/6600V

High Current Voltage Regulator

Dynamometer Load Test Equipment 300kW/2600kW

Power Generation 350kVA/1350kVA

15kV Hi Pot and Surge Tester

Subsea Pump Testing Facilities

SME COMPANY PROFILE

Submersible Motor Engineering Pty Ltd is an Australian Company that designs and manufactures Submersible and Subsea Electric Motors for Global Markets. SME has the ability to design and produce specialist electric motors for complex applications, in many cases for a “one off” requirement. SME should be the company of choice to work with to provide High Quality Engineered Solutions for your Subsea Motor requirements.

SME offers a Repair, Rewind Modification, and Technical Support Service, in Perth, and in Phoenix. With a new facility soon to be opened in the United kingdom. Our facilities ensure that we can handle any job we are confronted with, regardless of complexity. Our purpose built testing facility ensures absolute confidence in workmanship and reliability for our clients.

When it comes to Sales and Service of Submersible and Subsea Motors, SME’s range of Worldwide Locations ensures that we can provide excellent service and technical support on our own SME range of products, but also the products from all other manufacturers of Subsea Motors.